Match the following: Column-IColumn-II(i) Steady state[A]A blackened platinum wire, when gradually heated appear first red and then blue.(ii) Wein's displacementlaw[B] Radiated power isproportional to fourth power of absolute temperature of body(iii) Stefan's law[C] Energy absorbed is equal to energy emitted (iv) Black body[D] Absorptive power of body is unity

Match the following: Column-IColumn-II(i) Steady state[A]A …

Physics Wave and Sound Mix MCQ (Single Correct)

Match the following:

Column-I	Column-II
(i) Steady state	[A]A blackened platinum wire, when gradually heated appear first red and then blue.
(ii) Wein's displacement law	[B] Radiated power is proportional to fourth power of absolute temperature of body
(iii) Stefan's law	[C] Energy absorbed is equal to energy emitted
(iv) Black body	[D] Absorptive power of body is unity

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The correct answer is:

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Ans.

(i) [C]

(ii) [A]

(iii) [B]

(iv)[A],[D]

Sol.

(i) Energy absorbed is equal to energy emitted

(ii) A blackened platinum wire, when gradually heated appear first red and then blue.

(iii) Radiated power is proportional to fourth power of absolute temperature of body

(iv) A blackened platinum wire, when gradually heated appear first red and then blue, Absorptive power of body is unity

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