1.

Equal temperature difference exists between the ends of two metallic rods 1 and 2 of equal lengths. Their thermal conductivityis K_(1) and K_(2) and cross-sectionalareas are respectively A_(1) and A_(2). The condition for equal rate of heat transfer will be

Answer»

`K_(1)A_(1)^(2)=K_(2)A_(2)^(2)`
`K_(1)A_(2)=K_(2)A_(1)`
`K_(2)A_(1)=K_(2)A_(2)`
`K_(1)A_(2)^(2)=K_(2)^(2)A_(1)`.

ANSWER :C


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