Question

Observe the following circuits carefully. In which circuit will the bulb glow? Write Yes or No in the blank space provided along each of the circuit given in the figure.

(a)	Piece of coal	______
(b)	Iron nail	______
(c)	Eraser	______
(d)	Steel spoon	______

Answer 1

(a)	Piece of coal	No
(b)	Iron nail	Yes
(c)	Eraser	No
(d)	Steel spoon	Yes

Explanation:

1. Because piece of coal is a poor conductor of electricity.
2. Because iron nail is a good conductor of electricity.
3. Because eraser is a poor conductor of electricity.
4. Because steel spoon is a good conductor of electricity.