Two rods of same material and length have their electric resistance in ratio I : 2. When both rods are dipped in water, the correct statement will be

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A has more loss of weight

B has more loss of weight

both have same loss of weight

loss of weight will be in the ratio 1 : 2

answer is A.

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Detailed Solution

R=ρ lA ⇒ R1R2 = A2A1ρ, L constant⇒ A2A1 = R2R1=2Now, when a body dipped in water, loss of weight=VσLg=ALσLgSo, Loss of weight1Loss of weight2 =A1A2=2; so A has more loss of weight.

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