Ans: A circuit diagram is a simplified representation of an electrical circuit using symbols to depict various components.
Class 7 Exam > Class 7 Notes > Science (Curiosity) Class 7 - New NCERT > Very Short Question Answers: Electricity: Circuits and their Components
Class 7 Science Chapter 3 Very Short Question Answers - Electricity: Circuits and their Components
Q1: Circuit diagram is a simplified conventional pictorial representation of an_______________
Ans: Electrical circuit
Q2: A circuit diagram uses standard symbols for electric components. True/ False.
Ans: True.
Q3: Define electric circuit.
Ans: A closed path formed by connecting electrical components allows electric current to flow. This arrangement is known as an electric circuit.
Q4: What is a cell holder?
Ans: A compartment that holds two or more cells together to form a battery is called a cell holder.
Q5: The combination of two or more cells is called a __________________.
Ans: Battery
Q6: A circuit is said to be open circuit or complete when current flows through it. True/ False.
Ans: False
Q7: What is a battery?
Ans: A combination of two or more cells connected together is called a battery. It is formed by connecting the positive terminal of one cell to the negative terminal of another.
Q8: The symbol for a battery is
a. 
b. 
c. 
d. None of These
Ans: C
Q10: Draw the symbol for an electric bulb in an electric circuit.
Ans:
Symbol of an Electric bulb
Q9: What is a circuit diagram?
Q10: Why do we use copper wires in electrical circuits?
Ans: Copper is a good conductor of electricity, which allows the current to flow easily through the wires.
Q11: A Longer line in the symbol for a cell represents its ------- terminal.
Ans: Positive
Q12: What is an electric circuit?
Ans: Electric Circuit: The closed path in which electric current flows.
Q13: What happens when the current is switched ‘on’ in a room heater?
Ans: It becomes red hot and gives out heat.
Q14: Would any of the bulbs glow when the switch is in the ‘OFF’ position in a circuit?
Ans: No, the bulb will not glow when the switch is "OFF" because there is no closed circuit for current to flow.
Q15: What type of electricity is used in homes and industries?
Ans: Alternating Current (AC).
Q16: What happens if the filament in an incandescent lamp breaks?
Ans: The lamp stops glowing because the circuit is broken.
Q17: How does a torchlight produce light?
Ans: By passing current through a lamp powered by electric cells.
Q18: What is the purpose of using insulators in circuits?
Ans: To prevent electric shocks and ensure safety.
Q19: What material is used to make the body of most electric cells?
Ans: Metal.
Q20: What direction does current flow in a circuit?
Ans: From the positive terminal of the cell to the negative terminal.
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FAQs on Class 7 Science Chapter 3 Very Short Question Answers - Electricity: Circuits and their Components
| 1. What is an electric circuit? |  |
Ans. An electric circuit is a closed path through which electric current flows. It consists of various components like a power source, conductors, and loads that allow electricity to move from one point to another.
| 2. What are the main components of a circuit? | |
Ans. The main components of a circuit include a power source (like a battery), conductors (wires), a load (like a light bulb or motor), and sometimes switches to control the flow of electricity.
| 3. What is the difference between series and parallel circuits? | |
Ans. In a series circuit, components are connected one after the other, so the same current flows through all parts. In a parallel circuit, components are connected across common points, allowing multiple paths for current, which means the voltage across each component is the same.
| 4. How does a switch work in a circuit? | |
Ans. A switch works by opening or closing a circuit. When the switch is closed, it completes the circuit, allowing current to flow. When it is open, it breaks the circuit, stopping the flow of electricity.
| 5. Why is it important to use a fuse in an electrical circuit? | |
Ans. A fuse is important because it protects the circuit from overloads. If too much current flows, the fuse will melt and break the circuit, preventing damage to appliances and reducing the risk of fire.
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