Question

Komali created an electric circuit using some copper wires, a switch, a bulb and a battery. But the bulb didn't glow. Which of the following might be the reason(s) behind it?

• A. Switch is made up of chalk.
• B. The battery might have been a very new one.
• C. Bulb might have been fused.
• D. Copper wires were used for the connections.

Answer 1

Answer: (A), (C)

The correct options are
A Switch is made up of chalk.
C Bulb might have been fused.

Chalk is an insulator as it won't let current to pass through it, i.e. it cannot conduct electricity. So, Komali made a mistake in selecting chalk as the switch. Hence, the bulb didn't glow. Also there is a possibility that the bulb might be fused.