# NCERT Class 7 Science Chapter 3 Electricity: Circuits and their Components Solutions: In-Text and Exercise Questions Explained | SwaVid

Here are the questions and step-by-step solutions from the NCERT Class 7 Science textbook 'Curiosity', Chapter 3 'Electricity: Circuits and their Compon...

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# Electricity: Circuits and their Components

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Chapter 3 · Class 7 Science

Here are the questions and step-by-step solutions from the NCERT Class 7 Science textbook 'Curiosity', Chapter 3 'Electricity: Circuits and their Components', based on the new rationalised edition.

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In-text Questions

Answer: The torch lamp glows in the 'ON' position of its switch because the switch completes the electrical circuit, allowing electric current to flow from the battery through the lamp and back to the battery. When the switch is 'OFF', the circuit is open, and no current flows, so the lamp does not glow.

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- An electric circuit needs to be complete (closed) for electric current to flow through it.
- A switch is a device that either completes (closes) or breaks (opens) an electric circuit.
- When the switch of a torch is in the 'ON' position, it closes the circuit, creating a continuous path for electricity to flow from the battery, through the lamp's filament, and back to the battery.
- When the switch is in the 'OFF' position, it opens the circuit, creating a break in the path, which stops the flow of electricity.
- Therefore, the torch lamp glows only when the switch is in the 'ON' position because the circuit is complete, allowing current to reach the lamp and make it glow.
- NCERT Class 7 Science textbook: Curiosity : Chapter 3: Electricity: Circuits and their Components

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