Class 7 · Science · Curiosity

3. Electricity: Circuits and their Components

Try question 1

A switch in a circuit is used to

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Answer and explanation

Answer: B. complete or break the circuit

When the switch is on, current flows.

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Try question 2

Which of these is a good conductor of electricity?

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Answer and explanation

Answer: B. Copper

Copper wires are used in circuits because they conduct well.

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Try question 3

A bulb glows only when the circuit is

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Answer and explanation

Answer: B. closed (complete)

Current flows only through a complete path.

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