A, B in the figure are identical lamps. What changes occur in the brig – InterviewSolution

InterviewSolution

1.	A, B in the figure are identical lamps. What changes occur in the brightness of the lamps when its switch S in closed?
Answer» BRIGHTNESS of A increases but that of B decreases Brightness of A remains the same but that of B decreases Brighness of both A and B decreases Brightness of A increases but that of B remains the same Solution :When the key is closed, the EFFECTIVE resistance of the CIRCUIT decreases, HENCE current in A increases. So A glows with more intensity. When B is shunted, its glow decreases.

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