Questions
When three identical bulbs of 60 W, 200 V rating are connected in series to a 200 V supply, the power drawn by them will be
detailed solution
Correct option is D
Let R1, R2 and R3 be the resistances of three bulbs, respectively.In series order,R = R1 + R2 + R3But R = V2/P and supply voltage is the same as the rated voltage∴ V2P = V2P1 + V2P2 + V2P3or 1P =160 +160 +160 or P=603 =20 WTalk 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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