Question

pls tell the answer ​

Answer 1

Answer:

b. P only

Explanation:

This is because,

In circuit Q - There are two bulbs but there is no source of energy that is , there is no cell or battery.

Hence bulb will not glow in circuit Q.

In circuit R - There is a battery but in the bulb the filament is broken .

Hence bulb will not glow in circuit R .

BUT,

In circuit P - there is a source of energy, switch is kept on and the bulb filament is not broken.

Hence, bulb will glow in circuit P.(Ans)