Questions
If X, Y and Z in figure are identical lamps, which of the following changes to the brightness of the lamps occur when switch S is closed?
detailed solution
Correct option is B
P=V2R; Initially, I=V2RPower across PX=PY=V24RFinally, I=2V3R, Power PX=V29R,PY=PZ=V29RHence PX increases, PY decreases.Talk to our academic expert!
Similar Questions
A resistor R is connected across a battery of emf 12 V. It observed that terminal potential differenceis 9 V and the power delivered to resistor is 18 W. Internal resistance of the battery ‘r’ and the resistance R are respectively
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