Questions
Two heater wires of equal length are first connected in series and then in parallel. The ratio of heat produced in the two cases is
detailed solution
Correct option is D
In series, the equivalent resistance = 2 RIn parallel, the equivalent resistance = R2Power in series Ps=V22RPower in parallel Pp=V2R2=2V2R∴ PSPp=14Talk 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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