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Q.

Resistances R1, and R2, are joined in parallel and a current is passed so that the amount of heat liberated is H1 and H2, respectively. The ratio of H1 / H2, has the value

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a

R2 / R1,

b

R1 / R2

c

R12/R22

d

R22/R12

answer is A.

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Detailed Solution

We know that H=V2/RH1=V2R1 and H2=V2R2∴ H1H2=R2R1
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