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Q.

What is the ratio of heat generated in R and 2R?

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a

2 : 1

b

1 : 2

c

4 : 1

d

1 : 4

answer is A.

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Detailed Solution

Both R and 2R in parallel V−constantSo using P=V2R ⇒   P1P2 = R2R1⇒H1H2= R2R1=21
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