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All questions of Electricity and Circuits for Class 6 Exam
Which part of the bulb is an insulator?
- a)Q
- b)N
- c)R
- d)M
Correct answer is option 'D'. Can you explain this answer?
Which part of the bulb is an insulator?
a)
Q
b)
N
c)
R
d)
M
|
EduRev Class 6 answered |
'M' part of the bulb is made with insulator.
Because M is the glass cover, N is the filament, Q is the supporting wires, while R is the positive terminal of the bulb.
The path of electricity is called:- a)orbit
- b)filament
- c)current
- d)circuit
Correct answer is option 'D'. Can you explain this answer?
The path of electricity is called:
a)
orbit
b)
filament
c)
current
d)
circuit
|
Dr Manju Sen answered |
- A circuit is the closed loop or path through which electricity flows.
- An orbit refers to the path of celestial bodies.
- A filament is the thin wire inside a light bulb that heats up and produces light when electricity passes through it.
- Current refers to the flow of electricity, but not the path it takes.
So, the correct answer is D: Circuit.
The following diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness. A third lamp Z is connected in parallel lamp X.
Q. What happens to the brightness of lamp Y?- a)Very dim
- b)Normal
- c)Brighter than normal
- d)Dimmer than normal
Correct answer is option 'C'. Can you explain this answer?
The following diagram shows identical lamps X and Y connected in series with a battery. The lamps light with normal brightness. A third lamp Z is connected in parallel lamp X.
Q. What happens to the brightness of lamp Y?
a)
Very dim
b)
Normal
c)
Brighter than normal
d)
Dimmer than normal
|
Praveen Kumar answered |
Lamps X and Y are connected in series with a battery. If a third identical lamp Z is connected in parallel with X, then resistance of whole circuit reduces. Due to this, current drawn from battery will increase and bulb Y will be brighter than normal.
Sanchit’s mother warned him to avoid contact with electrical appliances or even electrical outlets when his hands are wet. Because wet hands cause .- a)The voltage of the circuit to be higher
- b)The voltage of the circuit to be lower
- c)Your resistance to be higher
- d)Your resistance to be lower
Correct answer is option 'D'. Can you explain this answer?
Sanchit’s mother warned him to avoid contact with electrical appliances or even electrical outlets when his hands are wet. Because wet hands cause .
a)
The voltage of the circuit to be higher
b)
The voltage of the circuit to be lower
c)
Your resistance to be higher
d)
Your resistance to be lower
|
Maya Deshpande answered |
Understanding Electrical Resistance
When Sanchit's mother warns him about wet hands and electrical appliances, she is highlighting a crucial aspect of electrical safety: resistance.
What is Resistance?
- Resistance is a property of materials that determines how easily electric current can flow through them.
- It is measured in ohms (Ω).
Effect of Wet Hands on Resistance
- Dry Skin Resistance: When your skin is dry, it has higher resistance, which means it is less conducive to electricity.
- Wet Skin Resistance: When your hands are wet, the moisture decreases the resistance significantly. This is because water, especially when it contains impurities (like salts), conducts electricity much better than dry skin.
Why is Lower Resistance Dangerous?
- Easier Current Flow: With lower resistance, more electric current can pass through the body if contact is made with an electrical appliance or outlet.
- Risk of Electric Shock: This increased current flow can lead to electric shocks, which can be harmful or even fatal.
Conclusion
Sanchit’s mother’s advice is rooted in the principle that wet hands lower your body's resistance to electrical current. To stay safe, it’s essential to keep your hands dry when handling electrical devices. Always prioritize safety to prevent accidents related to electricity!
When Sanchit's mother warns him about wet hands and electrical appliances, she is highlighting a crucial aspect of electrical safety: resistance.
What is Resistance?
- Resistance is a property of materials that determines how easily electric current can flow through them.
- It is measured in ohms (Ω).
Effect of Wet Hands on Resistance
- Dry Skin Resistance: When your skin is dry, it has higher resistance, which means it is less conducive to electricity.
- Wet Skin Resistance: When your hands are wet, the moisture decreases the resistance significantly. This is because water, especially when it contains impurities (like salts), conducts electricity much better than dry skin.
Why is Lower Resistance Dangerous?
- Easier Current Flow: With lower resistance, more electric current can pass through the body if contact is made with an electrical appliance or outlet.
- Risk of Electric Shock: This increased current flow can lead to electric shocks, which can be harmful or even fatal.
Conclusion
Sanchit’s mother’s advice is rooted in the principle that wet hands lower your body's resistance to electrical current. To stay safe, it’s essential to keep your hands dry when handling electrical devices. Always prioritize safety to prevent accidents related to electricity!
If we touch a naked current-carrying wire, we get a shock. This is because our body is a:- a)Source of electricity
- b)Conductor of electricity
- c)Insulator of electricity
- d)A and B both
Correct answer is option 'B'. Can you explain this answer?
If we touch a naked current-carrying wire, we get a shock. This is because our body is a:
a)
Source of electricity
b)
Conductor of electricity
c)
Insulator of electricity
d)
A and B both
|
Shivam Chakraborty answered |
Conductor of electricity
When we touch a naked current-carrying wire, we may experience an electric shock. This is because our body acts as a conductor of electricity. Let's understand why.
What is a conductor?
A conductor is a material that allows the flow of electric current through it easily. Metals such as copper and aluminum are good conductors of electricity. Our body contains a significant amount of water and various electrolytes, which makes it a conductor of electricity as well.
How does electricity flow?
Electricity is the flow of electrons through a conductor. In a current-carrying wire, electrons move from the negative terminal of a power source (such as a battery) towards the positive terminal. This movement of electrons creates an electric current.
Electric shock and our body as a conductor
When we touch a naked current-carrying wire, the electric current flows through our body. As our body is a conductor of electricity, the current passes through us. The severity of the shock depends on various factors like the voltage, current, and the path the current takes through our body.
Resistance and its role
Resistance is the property of a material that opposes the flow of electric current. In our body, the resistance to electric current flow is relatively high compared to metals. However, it is not high enough to prevent the flow of current completely. Therefore, we still experience an electric shock when touching a current-carrying wire.
Effects of electric shock
Electric shocks can cause various effects on our body, depending on the severity and duration of the shock. Mild shocks may cause a tingling sensation or muscle contractions, while severe shocks can lead to burns, injury, or even be life-threatening.
Precautions to avoid electric shocks
To avoid electric shocks, it is important to take certain precautions:
- Never touch naked or exposed wires.
- Always ensure electrical appliances and wiring are properly insulated.
- Use electrical safety devices like circuit breakers and residual current devices (RCDs).
- Seek professional help for electrical repairs or installations.
Conclusion
In conclusion, when we touch a naked current-carrying wire, we get a shock because our body acts as a conductor of electricity. The electric current flows through our body, causing the shock. It is important to take precautions to avoid such shocks and ensure electrical safety.
When we touch a naked current-carrying wire, we may experience an electric shock. This is because our body acts as a conductor of electricity. Let's understand why.
What is a conductor?
A conductor is a material that allows the flow of electric current through it easily. Metals such as copper and aluminum are good conductors of electricity. Our body contains a significant amount of water and various electrolytes, which makes it a conductor of electricity as well.
How does electricity flow?
Electricity is the flow of electrons through a conductor. In a current-carrying wire, electrons move from the negative terminal of a power source (such as a battery) towards the positive terminal. This movement of electrons creates an electric current.
Electric shock and our body as a conductor
When we touch a naked current-carrying wire, the electric current flows through our body. As our body is a conductor of electricity, the current passes through us. The severity of the shock depends on various factors like the voltage, current, and the path the current takes through our body.
Resistance and its role
Resistance is the property of a material that opposes the flow of electric current. In our body, the resistance to electric current flow is relatively high compared to metals. However, it is not high enough to prevent the flow of current completely. Therefore, we still experience an electric shock when touching a current-carrying wire.
Effects of electric shock
Electric shocks can cause various effects on our body, depending on the severity and duration of the shock. Mild shocks may cause a tingling sensation or muscle contractions, while severe shocks can lead to burns, injury, or even be life-threatening.
Precautions to avoid electric shocks
To avoid electric shocks, it is important to take certain precautions:
- Never touch naked or exposed wires.
- Always ensure electrical appliances and wiring are properly insulated.
- Use electrical safety devices like circuit breakers and residual current devices (RCDs).
- Seek professional help for electrical repairs or installations.
Conclusion
In conclusion, when we touch a naked current-carrying wire, we get a shock because our body acts as a conductor of electricity. The electric current flows through our body, causing the shock. It is important to take precautions to avoid such shocks and ensure electrical safety.
A potato can be used to find the polarity of a cell- a)True
- b)False
- c)Ambiguous
- d)Data insufficient
Correct answer is option 'A'. Can you explain this answer?
A potato can be used to find the polarity of a cell
a)
True
b)
False
c)
Ambiguous
d)
Data insufficient
|
|
Dr Manju Sen answered |
A potato is cut into two halves and the copper wires of a tester are inserted into it. After half an hour, it was noticed that there was a greenish blue spot on the potato around one wire whereas there was no such spot around the other wire. They found that it was always the wire connected to the positive terminal, which had a greenish blue spot around it. This concept could be used for identifying the positive terminal of a cell or a battery concealed in a box.
Hence, A potato can be used to find the polarity of a cell and the statement is true.
Hence, A potato can be used to find the polarity of a cell and the statement is true.
In the circuit shown here, bulb P will glow when
- a)A is closed, Band C are open
- b)A is closed, B is closed and C is open
- c)A is closed, Band C are closed
- d)Both B and C.
Correct answer is option 'D'. Can you explain this answer?
In the circuit shown here, bulb P will glow when
a)
A is closed, Band C are open
b)
A is closed, B is closed and C is open
c)
A is closed, Band C are closed
d)
Both B and C.
|
Rohini Seth answered |
In the circuit here, bulb P will glow when the circuit is complete.
The circuit should not be broken at any point.It should be continous at every point.
At A only one path is present so A has to be closed in every situation.
But from B and C even if one switch is closed the circuit will be complete.And in case both B and C are closed even then the circuit will be complete.
Thus answers are:
The circuit should not be broken at any point.It should be continous at every point.
At A only one path is present so A has to be closed in every situation.
But from B and C even if one switch is closed the circuit will be complete.And in case both B and C are closed even then the circuit will be complete.
Thus answers are:
- A closed, B closed and C open. OR
- A closed ,B and C both closed.
Thus, both option (B) and (C) are correct.
Correct option - (D).
Correct option - (D).
The given diagram is a torch containing cells. The torch is not glowing when the switch is ON. Now, it is opened to know the reasons. Which of the following statements are correct regarding the reasons?
(i) Bulb of the torch is fused.
(ii) Cells are not connected properly.
(iii) The metal parts of the torch do not make proper contact with the cell.
- a)Only (i) and (ii)
- b)Only (ii) and (iii)
- c)Only (i) and (iii)
- d)All (i), (ii) and (iii)
Correct answer is option 'D'. Can you explain this answer?
The given diagram is a torch containing cells. The torch is not glowing when the switch is ON. Now, it is opened to know the reasons. Which of the following statements are correct regarding the reasons?
(i) Bulb of the torch is fused.
(ii) Cells are not connected properly.
(iii) The metal parts of the torch do not make proper contact with the cell.
(i) Bulb of the torch is fused.
(ii) Cells are not connected properly.
(iii) The metal parts of the torch do not make proper contact with the cell.
a)
Only (i) and (ii)
b)
Only (ii) and (iii)
c)
Only (i) and (iii)
d)
All (i), (ii) and (iii)
|
Vp Classes answered |
The torch is not glowing because either its bulb is fused or cells are connected wrongly or metal spring of torch does not make proper contact with the cell.
Chapter doubts & questions for Electricity and Circuits - Science Olympiad 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.
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