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The current in C is 2 A. The rate of heat loss in A, B and c are 1.20, 0.60 and 1.20 J/s, respectively. The emf of the cell [for cell internal resistance - 0] is

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a

3 V

b

1.5 V

c

3.6 V

d

none of these

answer is B.

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Detailed Solution

Power = EI⇒ 1.20 +0.60 +1.20 = E × 2 ⇒ E=1.5 V

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