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A cylindrical rod having temperature T1 ...

A cylindrical rod having temperature `T_1` and `T_2` at its end. The rate of flow of heat `Q_1` cal/sec. If all the linear dimension are doubled keeping temperature remain const. then rate of flow of heat `Q_2` will be : -

A

`4Q_(1)`

B

`2Q_(1)`

C

`(Q_(1))/(4)`

D

`(Q_(1))/(2)`

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