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Question

Two conductors of resistance 2 R and R are connected in series in a battery circuit. The ration of heats developed in them is :

A
2 : 1
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B
1 : 2
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C
1 : 3
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D
1 : 4
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Solution

The correct option is A 2 : 1
In series current I is same therefore, by Joule's law,

H=I2Rt

HR R1:R2=2R:R=2:1

H1H2=R1R2=2:1

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