Questions
Two electric bulbs rated P1 watt V volts and P2 watt V volts are connected in parallel and V volts are applied to it. The total Power will be
detailed solution
Correct option is A
If resistances of bulbs are R1 and R2, respectively, then in parallel 1RP = 1R1+1R2⇒ 1V2Pp = 1V2P1+1V2P2 ⇒ PP = P1+P2Talk 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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