Questions
Figure shows three similar lamps P,Q and R connected across a power supply. If the lamp R fuses, how will the light emitted by P and Q change?
detailed solution
Correct option is B
before fusing resistance raio 2:1 potential across P 2V3 after fuse potential across P v2 as resistance ratio is 1:1 so brilliance of P decreases and Q increases as Power=V2RTalk to our academic expert!
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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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