a solid cylinder of length L and radius r is heat uptosame temperature as that of cube of edge length a . if both have same material , volume and allowed to cool under similar conditions , then ratio of amount of radiationsradiated will be

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Solution

The ratio of amount of heat radiated= $frac{P_{cyl}}{P_{cub}}=frac{A_{cyl}}{A_{cub}}=frac{pi r^{2}L}{a^{3}}$

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a solid cylinder of length L and radius r is heat uptosame temperature as that of cube of edge length a . if both have same material , volume and allowed to cool under similar conditions , then ratio of amount of radiationsradiated will be

The ratio of amount of heat radiated= PcylPcub=AcylAcub=πr2La3 frac{P_{cyl}}{P_{cub}}=frac{A_{cyl}}{A_{cub}}=frac{pi r^{2}L}{a^{3}}

The ratio of amount of heat radiated= $frac{P_{cyl}}{P_{cub}}=frac{A_{cyl}}{A_{cub}}=frac{pi r^{2}L}{a^{3}}$