SATHEE: Thermal Properties of Matter

Thermal Properties of Matter - Result Question 42

43. A black body is at temperature of $500 K$ . It emits energy at rate which is proportional to [1997]

(a) $(500)^{4}$

(b) $(500)^{3}$

(d) 500

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Answer:

Correct Answer: 43. (a)

Solution:

(a) According to Stefan’s Law $E = σ e A T^{4}$

$E \propto T^{4};$ so, $E \propto (500)^{4}$

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Thermal Properties of Matter - Result Question 42

43. A black body is at temperature of 500K. It emits energy at rate which is proportional to [1997]

Answer:

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43. A black body is at temperature of $500 K$ . It emits energy at rate which is proportional to [1997]