JEE PHYSICS MCQ: THERMAL PROPERTIES OF MATTER

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For a black body at temperature

727^{\circ} {C}

, its radiating power is

60 {~W}

and the temperature of surrounding is

227^{\circ} {C}

. If temperature of the black body is changed to

1227^{\circ} {C}

, then its radiating power will be

View answer and explanation

Correct option: B

320 {~W}

Option B (

320 {~W}

) is correct because the radiating power is proportional to the difference of the fourth power of the temperatures of the black body and its surroundings.

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