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A cylindrical rod having temperatures T₁ and T₂ at its ends. The rate of flow of heat is Q₁ cal/sec. If all the dimensions are doubled keeping T₁ and T₂ constant, then rate of flow of heat Q₂ will be:

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detailed solution

Correct option is B

Rate of heat flow =KA(T1-T2)l∞r2l

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A cylindrical rod having temperatures T1 and T2 at its ends. The rate of flow of heat is Q1 cal/sec. If all the dimensions are doubled keeping T1 and T2 constant, then rate of flow of heat Q2 will be:

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A cylindrical rod having temperatures T₁ and T₂ at its ends. The rate of flow of heat is Q₁ cal/sec. If all the dimensions are doubled keeping T₁ and T₂ constant, then rate of flow of heat Q₂ will be: