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All questions of Electricity and Circuits for Class 6 Exam
The base of an electric cell is its ___________terminal.- a)Positive terminal
- b)Negative terminal
- c)Negative and positive
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
The base of an electric cell is its ___________terminal.
a)
Positive terminal
b)
Negative terminal
c)
Negative and positive
d)
None of these
|
Varun Kapoor answered |
Metal cap is the positive terminal and the metal disc is the negative terminal of the electric cell. An electric cell produces electricity from the chemicals stored inside it.
Non metals like __________and __________are conductors of electricity- a)Wood and paper
- b)Graphite and gas carbon
- c)Glass and rubber
- d)None of theses
Correct answer is option 'B'. Can you explain this answer?
Non metals like __________and __________are conductors of electricity
a)
Wood and paper
b)
Graphite and gas carbon
c)
Glass and rubber
d)
None of theses
|
Ishan Choudhury answered |
Carbon is the only gas, when solidified, that can conduct electricity. This is of the form Graphite, when it only has 3 bonds between the atoms. This leaves electrons to flow through the network structure.
Kerosene oil is an example of _______________.- a)Conductors
- b)Insulators
- c)Electrolyte
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Kerosene oil is an example of _______________.
a)
Conductors
b)
Insulators
c)
Electrolyte
d)
None of these
|
Arjun Desai answered |
Petrol and kerosene oil have very low electrical conductivity and hence they are poor electrical conductors (i.e. insulators).
____________ is a device which converts chemical energy in to electrical energy.- a)Electrical bell
- b)Electric lift
- c)Electric cell
- d)Electric bulb
Correct answer is option 'C'. Can you explain this answer?
____________ is a device which converts chemical energy in to electrical energy.
a)
Electrical bell
b)
Electric lift
c)
Electric cell
d)
Electric bulb
|
|
Priyanshu Intelligent answered |
Off course Electric cell or EMF .Since all other options are
In _____________ electrical energy is transformed in to mechanical energy.- a)Transistor
- b)Mixer grinder
- c)Electromagnet
- d)Electric bell.
Correct answer is option 'B'. Can you explain this answer?
In _____________ electrical energy is transformed in to mechanical energy.
a)
Transistor
b)
Mixer grinder
c)
Electromagnet
d)
Electric bell.
|
Priyanka Sharma answered |
As the electrical energy is used to run blades in the mixer grinder and hence we say in mixer grinder electrical energy is transformed into mechanical energy(rotation of blades).
The tiny coiled metal wire present inside the bulb is called____________.- a)Element
- b)Conductor
- c)Filament
- d)None of these
Correct answer is option 'C'. Can you explain this answer?
The tiny coiled metal wire present inside the bulb is called____________.
a)
Element
b)
Conductor
c)
Filament
d)
None of these
|
Manasa Chauhan answered |
An incandescent light bulb has a small thin wire with two bigger wires holding it up. This wire is called a filament. The filament is the part of the light bulb that produces light. Filaments in incandescent light bulbs are made of tungsten.
A combination of two or more electric cells is called___________.- a)Electric circuit
- b)Battery
- c)Terminals
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
A combination of two or more electric cells is called___________.
a)
Electric circuit
b)
Battery
c)
Terminals
d)
None of these
|
Gayatri Chavan answered |
Battery. It is a collection of cells whose chemical reactions result in the flow of multiple electrons in circuits. Each battery consists of a positive side called the cathode and a negative side called the anode.
Also, it contains a unique electrolyte. When the battery is connected to power, chemical reactions take place somewhere between the electrolyte and anode.
A device that is used to break an electric circuit is called
- a)Earth wire
- b)Switch
- c)Live wire
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
A device that is used to break an electric circuit is called
a)
Earth wire
b)
Switch
c)
Live wire
d)
None of these
|
Kunal Mehta answered |
A device that is used to break an electric circuit is called switch.
The unit of electric current is:- a)Volt
- b)Ampere
- c)Ohm
- d)Joule
Correct answer is option 'B'. Can you explain this answer?
a)
Volt
b)
Ampere
c)
Ohm
d)
Joule
|
Shivam Chakraborty answered |
Understanding Electric Current
Electric current is a fundamental concept in the field of electricity and electronics. It refers to the flow of electric charge, typically through a conductor like a wire. The unit of electric current is crucial for measuring and understanding how electricity behaves in various applications.
Unit of Electric Current: Ampere
- The standard unit of electric current is called the Ampere, often abbreviated as A.
- One Ampere is defined as the flow of one coulomb of charge per second. This measurement helps quantify how much electric charge is moving through a circuit over a specific time.
Other Units Explained
- Volt (V): This is the unit of electric potential difference or voltage. It measures the force that pushes electric charges through a circuit.
- Ohm (Ω): This unit measures electrical resistance. It indicates how much a material opposes the flow of electric current.
- Joule (J): This unit measures energy. It is used to quantify the amount of work done or energy transferred when an electric current flows through a circuit.
Importance of Knowing the Unit
- Understanding that Ampere is the unit of electric current allows students to grasp how much electricity is being used or generated in different devices.
- Knowing the differences between these units helps in analyzing and designing electrical circuits effectively.
In summary, the correct answer to the question about the unit of electric current is B: Ampere, as it specifically measures the flow of electric charge in a circuit.
Electric current is a fundamental concept in the field of electricity and electronics. It refers to the flow of electric charge, typically through a conductor like a wire. The unit of electric current is crucial for measuring and understanding how electricity behaves in various applications.
Unit of Electric Current: Ampere
- The standard unit of electric current is called the Ampere, often abbreviated as A.
- One Ampere is defined as the flow of one coulomb of charge per second. This measurement helps quantify how much electric charge is moving through a circuit over a specific time.
Other Units Explained
- Volt (V): This is the unit of electric potential difference or voltage. It measures the force that pushes electric charges through a circuit.
- Ohm (Ω): This unit measures electrical resistance. It indicates how much a material opposes the flow of electric current.
- Joule (J): This unit measures energy. It is used to quantify the amount of work done or energy transferred when an electric current flows through a circuit.
Importance of Knowing the Unit
- Understanding that Ampere is the unit of electric current allows students to grasp how much electricity is being used or generated in different devices.
- Knowing the differences between these units helps in analyzing and designing electrical circuits effectively.
In summary, the correct answer to the question about the unit of electric current is B: Ampere, as it specifically measures the flow of electric charge in a circuit.
Which of the following is NOT a function of an electric cell?- a)Providing a power source for portable devices
- b)Acting as a conductor of electricity
- c)Storing chemical energy to be converted into electrical energy
- d)Powering devices like wristwatches and radios
Correct answer is option 'B'. Can you explain this answer?
a)
Providing a power source for portable devices
b)
Acting as a conductor of electricity
c)
Storing chemical energy to be converted into electrical energy
d)
Powering devices like wristwatches and radios
|
Gunjan Lakhani answered |
An electric cell does not act as a conductor of electricity; rather, it serves as a power source by converting stored chemical energy into electrical energy. Conductors are materials that allow electricity to flow through them, which is different from the function of an electric cell.
__________is a conductor.- a)Wood
- b)Metal
- c)Paper
- d)Petrol
Correct answer is option 'B'. Can you explain this answer?
__________is a conductor.
a)
Wood
b)
Metal
c)
Paper
d)
Petrol
|
|
Darshan Patel answered |
Conductor:
- A conductor is a material that allows the flow of electric current through it.
- It is characterized by its ability to conduct heat and electricity.
- Conductors have high electrical conductivity.
- They have free electrons that can move easily through the material.
- The flow of electrons constitutes an electric current.
- Conductors are used in various electrical and electronic devices to carry and transmit electricity.
- Examples of common conductors include metals such as copper, aluminum, and silver.
- These metals have high electrical conductivity due to the presence of loosely bound electrons.
- Among the given options, metal (option B) is the only material that is a conductor.
- Wood (option A), paper (option C), and petrol (option D) are not conductors of electricity.
- Wood and paper are insulators, while petrol is a non-conductive liquid.
- Therefore, the correct answer is option B: Metal.
- A conductor is a material that allows the flow of electric current through it.
- It is characterized by its ability to conduct heat and electricity.
- Conductors have high electrical conductivity.
- They have free electrons that can move easily through the material.
- The flow of electrons constitutes an electric current.
- Conductors are used in various electrical and electronic devices to carry and transmit electricity.
- Examples of common conductors include metals such as copper, aluminum, and silver.
- These metals have high electrical conductivity due to the presence of loosely bound electrons.
- Among the given options, metal (option B) is the only material that is a conductor.
- Wood (option A), paper (option C), and petrol (option D) are not conductors of electricity.
- Wood and paper are insulators, while petrol is a non-conductive liquid.
- Therefore, the correct answer is option B: Metal.
How does a closed electric circuit ensure that a bulb lights up?- a)By allowing the bulb to bypass the electric cell
- b)By connecting both terminals of the electric cell to each other directly
- c)By providing a continuous path for current to flow through the bulb
- d)By using a switch to open and close the circuit
Correct answer is option 'C'. Can you explain this answer?
a)
By allowing the bulb to bypass the electric cell
b)
By connecting both terminals of the electric cell to each other directly
c)
By providing a continuous path for current to flow through the bulb
d)
By using a switch to open and close the circuit
|
EduRev Class 6 answered |
A closed electric circuit provides a continuous path for the electric current to flow from one terminal of the electric cell to the other terminal through the bulb. This flow of current through the filament of the bulb makes it glow.
----------- is an insulator.- a)Metal
- b)acid
- c)Rubber
- d)Salt solution
Correct answer is option 'C'. Can you explain this answer?
----------- is an insulator.
a)
Metal
b)
acid
c)
Rubber
d)
Salt solution
|
|
Nishu💞 answered |
C...as electricity can't pass through rubber.
A material which does not allow the electricity to pass through it is___________.- a)Conductor
- b)Electric cell
- c)Insulator
- d)None of these.
Correct answer is option 'C'. Can you explain this answer?
A material which does not allow the electricity to pass through it is___________.
a)
Conductor
b)
Electric cell
c)
Insulator
d)
None of these.
|
Moumita Roy answered |
An electrical insulator is a material whose internal electric charges do not flow freely; very little electric current will flow through it under the influence of an electric field.
A material which allows the electricity to pass through it is ________.- a)conductor
- b)Insulator
- c)Transistor
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
A material which allows the electricity to pass through it is ________.
a)
conductor
b)
Insulator
c)
Transistor
d)
None of these
|
Anita Menon answered |
Conductors are the materials or substances which allow electricity to flow through them. They are able to conduct electricity because they allow electrons to flow inside them very easily.
Electric energy is produced from the____________ within the cell.- a)Chemicals
- b)Metals
- c)Terminals
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Electric energy is produced from the____________ within the cell.
a)
Chemicals
b)
Metals
c)
Terminals
d)
None of these
|
Geetika Shah answered |
In simple cell battery converts chemical energy into electricity. The chemical reaction produces electrons, which then collect at the negative terminal of the battery. When there is a connection between the positive and negative terminal, the electrons flow to the positive terminal.
----------- is the positive terminal of an electric cell.- a)Metal disc
- b)Metal case
- c)Metal cap
- d)Metal base
Correct answer is option 'C'. Can you explain this answer?
----------- is the positive terminal of an electric cell.
a)
Metal disc
b)
Metal case
c)
Metal cap
d)
Metal base
|
Harshitha Mukherjee answered |
The electric cell has two terminals: a positive terminal and negative terminal. The metal cap is positive terminal of the electric cell whereas metal disc is the negative terminal of the electric cell.
What material is used to make the filament in a torch bulb?- a)Aluminium
- b)Plastic
- c)Tungsten
- d)Copper
Correct answer is option 'C'. Can you explain this answer?
a)
Aluminium
b)
Plastic
c)
Tungsten
d)
Copper
|
Rahul Kumar answered |
The filament of a torch bulb is made of tungsten. Tungsten is used because it has a high melting point, allowing it to glow brightly without melting when electricity passes through it. This makes it ideal for producing light in incandescent bulbs.
------------- is an energy which flows in an electric circuit.- a)Electric circuit
- b)Electromagnet
- c)Electric current
- d)None of these.
Correct answer is option 'C'. Can you explain this answer?
------------- is an energy which flows in an electric circuit.
a)
Electric circuit
b)
Electromagnet
c)
Electric current
d)
None of these.
|
|
Harshitha Mukherjee answered |
An electric current is a flow of electric charge. In electric circuits this charge is often carried by moving electrons in a wire. It can also be carried by ions in an electrolyte, or by both ions and electrons such as in an ionised gas (plasma).
A complete electric circuit is called ______________ electric circuit.- a)open
- b)Closed
- c)Complete
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
A complete electric circuit is called ______________ electric circuit.
a)
open
b)
Closed
c)
Complete
d)
None of these
|
Lavanya Menon answered |
Closed circuit means a complete electrical connection around which current flows or circulates.
What is the purpose of a switch in an electric circuit?- a)To increase the voltage in the circuit
- b)To control the flow of electricity by opening or closing the circuit
- c)To store electrical energy
- d)To convert electrical energy into light energy
Correct answer is option 'B'. Can you explain this answer?
a)
To increase the voltage in the circuit
b)
To control the flow of electricity by opening or closing the circuit
c)
To store electrical energy
d)
To convert electrical energy into light energy
|
Dr Manju Sen answered |
A switch controls the flow of electricity in a circuit by either opening (breaking) or closing (completing) the circuit. This allows you to turn electrical devices on or off as needed.
Which of these is a source of direct current (DC)?- a)Electric generator
- b)Solar cell
- c)Alternating current mains
- d)Transformer
Correct answer is option 'B'. Can you explain this answer?
a)
Electric generator
b)
Solar cell
c)
Alternating current mains
d)
Transformer
|
Shiksha Academy answered |
Solar cells produce direct current (DC). In contrast, an electric generator often produces alternating current (AC).
How can you determine if a material is a conductor or an insulator using a simple circuit?- a)By checking if the material is shiny
- b)By observing if the bulb glows when the material is included in the circuit
- c)By measuring the length of the material
- d)By noting the color of the material
Correct answer is option 'B'. Can you explain this answer?
a)
By checking if the material is shiny
b)
By observing if the bulb glows when the material is included in the circuit
c)
By measuring the length of the material
d)
By noting the color of the material
|
Aditya Menon answered |
Observing the Bulb Glow to Determine if a Material is a Conductor or an Insulator
Conductors and insulators are two types of materials that have different abilities to allow the flow of electricity. A simple circuit can be used to determine if a material is a conductor or an insulator. Here's how you can do it:
Setting up the Circuit
- Create a simple circuit with a battery, wires, and a bulb.
- Make sure the circuit is complete and the bulb is glowing when the circuit is closed.
Testing the Material
- Insert the material you want to test into the circuit.
- If the bulb continues to glow brightly, then the material is a conductor. Conductors allow electricity to flow through them easily.
- If the bulb does not light up or glows dimly, then the material is an insulator. Insulators do not allow electricity to flow through them easily.
Explanation
- When the material is included in the circuit, it either allows the flow of electricity (conductor) or blocks the flow of electricity (insulator).
- Conductors have free electrons that can move easily, allowing electricity to flow through them. This is why the bulb continues to glow when a conductor is included in the circuit.
- Insulators, on the other hand, do not have free electrons that can move easily. This prevents the flow of electricity, resulting in the bulb not lighting up or glowing dimly when an insulator is included in the circuit.
By observing the behavior of the bulb in the circuit with the material, you can determine if the material is a conductor or an insulator.
Conductors and insulators are two types of materials that have different abilities to allow the flow of electricity. A simple circuit can be used to determine if a material is a conductor or an insulator. Here's how you can do it:
Setting up the Circuit
- Create a simple circuit with a battery, wires, and a bulb.
- Make sure the circuit is complete and the bulb is glowing when the circuit is closed.
Testing the Material
- Insert the material you want to test into the circuit.
- If the bulb continues to glow brightly, then the material is a conductor. Conductors allow electricity to flow through them easily.
- If the bulb does not light up or glows dimly, then the material is an insulator. Insulators do not allow electricity to flow through them easily.
Explanation
- When the material is included in the circuit, it either allows the flow of electricity (conductor) or blocks the flow of electricity (insulator).
- Conductors have free electrons that can move easily, allowing electricity to flow through them. This is why the bulb continues to glow when a conductor is included in the circuit.
- Insulators, on the other hand, do not have free electrons that can move easily. This prevents the flow of electricity, resulting in the bulb not lighting up or glowing dimly when an insulator is included in the circuit.
By observing the behavior of the bulb in the circuit with the material, you can determine if the material is a conductor or an insulator.
A battery is- a)a combination of cells in which cells are joined (+) to (-)
- b)a single cell
- c)a combination of cells in which cells are joined (+) to (+)
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
A battery is
a)
a combination of cells in which cells are joined (+) to (-)
b)
a single cell
c)
a combination of cells in which cells are joined (+) to (+)
d)
None of these
|
|
Gunjan Lakhani answered |
A battery is made up of multiple cells connected together, where the positive terminal of one cell is connected to the negative terminal of the next, forming a series connection. This allows the battery to generate a higher voltage.
Therefore,Right Answer- Option A
Therefore,Right Answer- Option A
A device used to measure electric current is called:- a)Voltmeter
- b)Ammeter
- c)Galvanometer
- d)Thermometer
Correct answer is option 'B'. Can you explain this answer?
a)
Voltmeter
b)
Ammeter
c)
Galvanometer
d)
Thermometer
|
Learning Enablers answered |
An ammeter measures the flow of current in amperes. Voltmeters measure voltage, and galvanometers detect small currents.
Electricity to the bulb in a torch is provided by the _____.- a)Generator
- b)Electric wire
- c)Electric cell
- d)Switch
Correct answer is option 'C'. Can you explain this answer?
Electricity to the bulb in a torch is provided by the _____.
a)
Generator
b)
Electric wire
c)
Electric cell
d)
Switch
|
Torcia Education answered |
The electricity to the bulb in a torch is provided by the electric cell. The electric cell is like a small power source that gives energy to make the bulb light up.
Bulb glows only in- a)open circuit
- b)closed circuit
- c)in both circuits
- d)open circuit if bulb is not fused
Correct answer is option 'B'. Can you explain this answer?
Bulb glows only in
a)
open circuit
b)
closed circuit
c)
in both circuits
d)
open circuit if bulb is not fused
|
Nilotpal Nambiar answered |
Only a closed circuit is a complete circuit.
Why should you never connect the two terminals of an electric cell directly?- a)It could cause the cell to explode
- b)It will deplete the cell quickly and cause it to stop working
- c)It will increase the voltage in the circuit
- d)It will make the cell produce light
Correct answer is option 'B'. Can you explain this answer?
a)
It could cause the cell to explode
b)
It will deplete the cell quickly and cause it to stop working
c)
It will increase the voltage in the circuit
d)
It will make the cell produce light
|
|
Torcia Education answered |
Connecting the two terminals of an electric cell directly without a proper circuit can cause the chemicals inside the cell to be used up rapidly, leading to the cell's quick depletion. This is because a direct connection creates a short circuit, which is harmful to the cell's longevity.
What is the primary purpose of an electric cell in a torch?- a)To convert electrical energy into light energy
- b)To store electrical energy for later use
- c)To provide electricity to the bulb in the torch
- d)To prevent electric shocks
Correct answer is option 'C'. Can you explain this answer?
a)
To convert electrical energy into light energy
b)
To store electrical energy for later use
c)
To provide electricity to the bulb in the torch
d)
To prevent electric shocks
|
|
Torcia Education answered |
An electric cell provides the electricity needed for the bulb in a torch to light up. It produces electricity through chemical reactions within it, which then flows through the circuit to illuminate the bulb. This fundamental component allows portable lighting devices like torches to function.
_______ is an electric device which easily closes or opens an electric circuit.
- a)Filament
- b)Electric bulb
- c)Electric switch
- d)Electric cell
Correct answer is option 'C'. Can you explain this answer?
_______ is an electric device which easily closes or opens an electric circuit.
a)
Filament
b)
Electric bulb
c)
Electric switch
d)
Electric cell
|
|
Gayatri Chavan answered |
The correct answer is option 'C' (Electric switch) An electric switch is an electric device that easily closes or opens an electric circuit. When a switch is closed, it completes the circuit and allows electricity to flow through it, whereas when a switch is open, it breaks the circuit and stops the flow of electricity. Electric switches come in many different forms and are used to control the flow of electricity in a wide range of applications.
Which of the following materials is NOT a good conductor of electricity?- a)Copper
- b)Iron
- c)Plastic
- d)Silver
Correct answer is option 'C'. Can you explain this answer?
a)
Copper
b)
Iron
c)
Plastic
d)
Silver
|
|
Torcia Education answered |
Plastic is not a good conductor of electricity; it is an insulator. Insulators like plastic are used to cover electrical wires to prevent accidental shocks by keeping the electricity contained within the wires.
The electric current in a closed circuit always flows from the ___________terminal of the electric cell to the ______terminal.- a)Negative to positive
- b)Positive to negative
- c)Positive to positive
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
The electric current in a closed circuit always flows from the ___________terminal of the electric cell to the ______terminal.
a)
Negative to positive
b)
Positive to negative
c)
Positive to positive
d)
None of these
|
Moumita Kumar answered |
The electric current always flows from the higher potential to lower potential. The positive terminal of an electric cell is at higher potential with respect to its negative terminal. Hence, in the given circuit, the current will flow from terminal P to terminal N.
If a bulb does not light up when connected to a cell, which of the following could be the reason?- a)The bulb is made of glass
- b)The circuit is not complete
- c)The cell is overcharged
- d)The wires are too long
Correct answer is option 'B'. Can you explain this answer?
a)
The bulb is made of glass
b)
The circuit is not complete
c)
The cell is overcharged
d)
The wires are too long
|
|
Rahul Kumar answered |
If a bulb does not light up, it often means that the circuit is not complete. For the bulb to glow, the circuit must provide a continuous path for the electric current to flow through the bulb. If there is any break in this path, the bulb will not light up.
Why does a fused bulb not light up?
- a)Due to a break in the filament
- b)Because the bulb is too old
- c)Because of excessive voltage
- d)None of these
Correct answer is option 'A'. Can you explain this answer?
Why does a fused bulb not light up?
a)
Due to a break in the filament
b)
Because the bulb is too old
c)
Because of excessive voltage
d)
None of these
|
|
EduRev Class 6 answered |
A break in the filament disrupts the path of the current between the terminals of the electric cell, and as a result, the fused bulb does not light up because no current can pass through its filament.
Why are rubber and plastic used in electrical appliances?- a)To conduct electricity
- b)To act as a conductor
- c)To insulate and prevent accidental electric shocks
- d)To increase the efficiency of the electric circuit
Correct answer is option 'C'. Can you explain this answer?
a)
To conduct electricity
b)
To act as a conductor
c)
To insulate and prevent accidental electric shocks
d)
To increase the efficiency of the electric circuit
|
Nishtha Mukherjee answered |
Importance of Rubber and Plastic in Electrical Appliances
Rubber and plastic are essential materials used in electrical appliances primarily for their insulating properties. Let's explore why they are crucial in this context.
1. Insulation Properties
- Rubber and plastic are excellent insulators, meaning they do not conduct electricity.
- This prevents the flow of electric current through the materials, ensuring that electricity travels only through intended pathways.
2. Safety from Electric Shocks
- By insulating electrical components, rubber and plastic help to prevent accidental electric shocks to users.
- Without proper insulation, exposed wires or faulty connections could lead to severe electric hazards.
3. Protection from Environmental Factors
- Rubber and plastic materials shield electrical components from moisture, dust, and heat, which could otherwise cause short circuits or damage.
- This ensures the longevity and reliability of electrical appliances in various environments.
4. Lightweight and Flexible
- Rubber and plastic are lightweight materials that make appliances easier to handle and use.
- Their flexibility allows for various designs and shapes, enhancing the functionality and aesthetics of the products.
5. Cost-Effectiveness
- Both rubber and plastic are relatively inexpensive compared to metals, making them cost-effective choices for manufacturers.
- This affordability helps keep the overall cost of electrical appliances down for consumers.
In summary, rubber and plastic are pivotal in electrical appliances due to their insulating properties, safety features, environmental protection, lightweight nature, and cost-effectiveness. These materials play a crucial role in ensuring the safe and efficient operation of electrical devices.
Rubber and plastic are essential materials used in electrical appliances primarily for their insulating properties. Let's explore why they are crucial in this context.
1. Insulation Properties
- Rubber and plastic are excellent insulators, meaning they do not conduct electricity.
- This prevents the flow of electric current through the materials, ensuring that electricity travels only through intended pathways.
2. Safety from Electric Shocks
- By insulating electrical components, rubber and plastic help to prevent accidental electric shocks to users.
- Without proper insulation, exposed wires or faulty connections could lead to severe electric hazards.
3. Protection from Environmental Factors
- Rubber and plastic materials shield electrical components from moisture, dust, and heat, which could otherwise cause short circuits or damage.
- This ensures the longevity and reliability of electrical appliances in various environments.
4. Lightweight and Flexible
- Rubber and plastic are lightweight materials that make appliances easier to handle and use.
- Their flexibility allows for various designs and shapes, enhancing the functionality and aesthetics of the products.
5. Cost-Effectiveness
- Both rubber and plastic are relatively inexpensive compared to metals, making them cost-effective choices for manufacturers.
- This affordability helps keep the overall cost of electrical appliances down for consumers.
In summary, rubber and plastic are pivotal in electrical appliances due to their insulating properties, safety features, environmental protection, lightweight nature, and cost-effectiveness. These materials play a crucial role in ensuring the safe and efficient operation of electrical devices.
The path along which electric current flows is_____________.- a)Switch
- b)Electric current
- c)Electric circuit
- d)Electric cell
Correct answer is option 'C'. Can you explain this answer?
The path along which electric current flows is_____________.
a)
Switch
b)
Electric current
c)
Electric circuit
d)
Electric cell
|
|
Gayatri Chavan answered |
Circuit A path through which electric charges flow. A continuous, unbroken path through which electrons can flow is a closed circuit. Charges, or current, can flow only through a closed circuit. A break or opening in a circuit creates an open circuit.
Which of these appliances does NOT use the heating effect of electric current?- a)Electric iron
- b)Electric kettle
- c)Refrigerator
- d)Toaster
Correct answer is option 'C'. Can you explain this answer?
a)
Electric iron
b)
Electric kettle
c)
Refrigerator
d)
Toaster
|
Eduskill Classes answered |
A refrigerator primarily uses electric current for cooling, while devices like irons and toasters use the heating effect.
A bulb has- a)two terminals and two filaments
- b)two terminals and one filament
- c)multiple terminals and single filament
- d)single terminal and single filament
Correct answer is option 'B'. Can you explain this answer?
A bulb has
a)
two terminals and two filaments
b)
two terminals and one filament
c)
multiple terminals and single filament
d)
single terminal and single filament
|
EduRev UPSC answered |
A bulb has a filament which glows and two terminals which are joined to two terminals of the battery.
Cell is a device which- a)electrical energy into light energy
- b)converts chemical energy into electrical energy
- c)electrical energy into magnetic energy
- d)None of these
Correct answer is option 'B'. Can you explain this answer?
Cell is a device which
a)
electrical energy into light energy
b)
converts chemical energy into electrical energy
c)
electrical energy into magnetic energy
d)
None of these
|
Upsc Toppers answered |
In a cell, chemicals are used to produce potential difference.
What happens to the current in a parallel circuit when one path is broken?- a)The entire circuit stops working
- b)Current increases
- c)Current decreases
- d)Current continues through other paths
Correct answer is option 'D'. Can you explain this answer?
What happens to the current in a parallel circuit when one path is broken?
a)
The entire circuit stops working
b)
Current increases
c)
Current decreases
d)
Current continues through other paths
|
|
EduRev Class 6 answered |
In a parallel circuit, each path operates independently. If one path is broken:
- The current continues to flow through the remaining paths.
- This means that other devices connected in parallel will still function.
- Only the broken path will stop conducting electricity.
This characteristic of parallel circuits ensures reliability, as the failure of one component does not disrupt the entire system.
Which part of the electric circuit provides energy to the circuit?- a)Bulb
- b)Switch
- c)Battery
- d)Wires
Correct answer is option 'C'. Can you explain this answer?
a)
Bulb
b)
Switch
c)
Battery
d)
Wires
|
|
Dr Manju Sen answered |
A battery stores chemical energy and converts it into electrical energy, supplying power to the circuit.
The filament of an electric bulb is made of:- a)Copper
- b)Tungsten
- c)Iron
- d)Aluminium
Correct answer is option 'B'. Can you explain this answer?
a)
Copper
b)
Tungsten
c)
Iron
d)
Aluminium
|
|
EduRev Class 6 answered |
Tungsten is used due to its high melting point, allowing it to glow without melting when electricity passes through.
Which device is used to open or close an electric circuit?- a)Bulb
- b)Battery
- c)Switch
- d)Resistor
Correct answer is option 'C'. Can you explain this answer?
a)
Bulb
b)
Battery
c)
Switch
d)
Resistor
|
|
EduRev Class 6 answered |
A switch controls the flow of current by opening (breaking) or closing (completing) the circuit.
In a series circuit, if one bulb is removed or burns out:- a)The other bulbs continue to glow
- b)The circuit becomes incomplete
- c)The brightness of other bulbs increases
- d)The brightness of other bulbs decreases
Correct answer is option 'B'. Can you explain this answer?
a)
The other bulbs continue to glow
b)
The circuit becomes incomplete
c)
The brightness of other bulbs increases
d)
The brightness of other bulbs decreases
|
|
EduRev Class 6 answered |
In a series circuit, all components are connected in a single path. If one component fails, the entire circuit stops working.
Which of the following is NOT an effect of electric current?- a)Heating effect
- b)Magnetic effect
- c)Sound effect
- d)Chemical effect
Correct answer is option 'C'. Can you explain this answer?
a)
Heating effect
b)
Magnetic effect
c)
Sound effect
d)
Chemical effect
|
|
Learning Enablers answered |
Electric current causes heating, magnetic, and chemical effects, but sound is not a direct effect of current.
A material that allows electricity to flow easily is called a:- a)Conductor
- b)Insulator
- c)Semiconductor
- d)Resistor
Correct answer is option 'A'. Can you explain this answer?
a)
Conductor
b)
Insulator
c)
Semiconductor
d)
Resistor
|
|
Dr Manju Sen answered |
Conductors like metals permit the flow of electric current due to their free electrons.
What happens to the bulb when the circuit is incomplete?- a)The bulb glows brightly
- b)The bulb glows dimly
- c)The bulb does not glow
- d)The bulb explodes
Correct answer is option 'C'. Can you explain this answer?
a)
The bulb glows brightly
b)
The bulb glows dimly
c)
The bulb does not glow
d)
The bulb explodes
|
Vp Classes answered |
A complete (closed) circuit is required for current to flow and light the bulb. Incomplete circuits stop the flow of electricity.
Which of these is an example of a closed circuit?- a)A circuit with a broken wire
- b)A circuit with a switch turned on
- c)A circuit without a battery
- d)A circuit with an open switch
Correct answer is option 'B'. Can you explain this answer?
a)
A circuit with a broken wire
b)
A circuit with a switch turned on
c)
A circuit without a battery
d)
A circuit with an open switch
|
|
Dr Manju Sen answered |
When the switch is on, the circuit is closed, allowing current to flow. Broken wires or open switches result in incomplete circuits.
Chapter doubts & questions for Electricity and Circuits - Science Class 6 2025 is part of Class 6 exam preparation. The chapters have been prepared according to the Class 6 exam syllabus. The Chapter doubts & questions, notes, tests & MCQs are made for Class 6 2025 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests here.
Chapter doubts & questions of Electricity and Circuits - Science Class 6 in English & Hindi are available as part of Class 6 exam.
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