Question

In the given diagram, there are two switches $S_1$ and $S_2$ and two bulbs X and Y. If switch $S_1$ is closed and switch $S_2$ is open then

• A. Only bulb X will glow
• B. Only bulb Y will glow.
• C. Both bulbs X and Y will glow.
• D. Neither bulb X nor bulb Y will glow.

Answer 1

The correct option is B Only bulb Y will glow.

Since switch $S_2$ is open and $S_1$ is closed, the current will pass through Y but for bulb X, the circuit is incomplete. There is no complete path for current to flow for bulb X. Hence, only bulb Y will glow.