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Two wires of same mass , having ratio of...

Two wires of same mass , having ratio of lengths `1 : 2, density 1 : 3`, and specific electrical resistance respectively ` 2 : 1`, are connected one by one to the same volltage supply. The rate of heat dissipation in the first wire is found to be `10 W`. Find the rate of heat dissipation in the second wire.

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