If X, Y, and Z in figure are identical lamps, then which of…

Physics Current Electricity Power, Energy, Battery, EMF, Terminal Voltage, KCL & KVL MCQ (Single Correct)

If X, Y, and Z in figure are identical lamps, then which of the following bulbs will show change in brightness when switch S is closed?

X stays same, Y decreases

X increased, Y decreases

X increases, Y stays the same

X decreases, Y increases

Text Solution

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The correct answer is:

When S is closed, the potential drop across a and b decreases, and across a and c increases.
X will glow more while y will glow less.

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