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Question

In the given diagram, there are two switches S1 and S2 and two bulbs X and Y. If switch S1 is closed and switch S2 is open then
809848_6eaf3b07b7fa4cc18eff263ada9574df.JPG
  1. Only bulb X will glow
  2. Only bulb Y will glow.
  3. Both bulbs X and Y will glow.
  4. Neither bulb X nor bulb Y will glow.

A
Only bulb Y will glow.
B
Neither bulb X nor bulb Y will glow.
C
Only bulb X will glow
D
Both bulbs X and Y will glow.
Solution
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Since switch S2 is open and S1 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.

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