1.

Two rods of same length and areas of cross-section A_(1) and A_(2) have their ends maintained at same temperature. If K_(1) and K_(2) are their thermal conductivities, c_(1) and c_(2) are the specific heats of their material and rho_(1),rho_(2) their densities, then for the rate of flow by conduction through them to be equal

Answer»

`(A_(1))/(A_(2))=(K_(1))/(c_(1)rho_(1))(c_(2)rho_(2))/(K_(2))`
`(A_(1))/(A_(2))=(K_(1))/(K_(2))`
`(A_(1))/(A_(2))=(K_(1))/(K_(2))(c_(1)rho_(1))/(c_(2)rho_(2))`
`(A_(1))/(A_(2))=(K_(2))/(K_(1))`

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