The rate of loss of heat by radiation from a body at 40 0 ∘ C is R . The radiation from it when the temperature rises to 80 0 ∘ C will be:

T changes from 673 K to 1073 K. The ratio is ( 673 1073 ) 4 ≈ 6.5 , which is not 2, 4 or 16. D.

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Physics - Heat & Thermo Question with Solution | TestHub

PhysicsHeat & ThermoHeat TransferMedium2 min

PhysicsMediumsingle choice

The rate of loss of heat by radiation from a body at $40 0^{\circ}$ C is $R$ . The radiation from it when the temperature rises to $80 0^{\circ}$ C will be:

Options:

Answer:

Solution:

$T$ changes from 673 K to 1073 K. The ratio is $(\frac{1073}{673})^{4} \approx 6.5$ , which is not 2, 4 or 16. D.

Subject:PhysicsTopic:Heat & ThermoSubtopic:Heat Transfer

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