Question

Which of the following can be used as a switch in an electric circuit?

• A. A strip of paper
• B. A piece of chalk
• C. A wooden piece
• D. An iron piece

Answer 1

The correct option is D An iron piece

Good conductors allow electricity to pass through them, whereas, bad conductors do not. An iron piece is a good conductor of electricity and the rest of the options are bad conductors. Hence, the iron piece can be used as a switch in a circuit.