Physics
In the circuit given below, identify the lamp (L1, L2, L3 and L4) whose failure would not interrupt the power supply to the other lamps.
- L1
- L2
- L3
- L4
Current Electricity
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Answer
L2
Reason — In the circuit, L1 and L3 are placed in the main vertical branch, so if either of them fails, the circuit path breaks and current cannot reach the other lamps.
L4 is also part of the lower main path; its failure would interrupt the current in that branch.
However, L2 is connected in a separate parallel branch between the two sides of the circuit so if L2 fails, only that branch becomes open while current can still flow through the rest of the circuit containing L1, L3, and L4.
Therefore, the failure of L2 would not interrupt the power supply to the other lamps.
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