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MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

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For a perfectly black body, coefficient of emission is

2

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

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Two rods of different metals have coefficients of linear expansion '$$\alpha_1$$' and '$$\alpha_2$$' respectvely. Their respective lengths are '$$\mathrm{L}_1$$' and '$$\mathrm{L}_2$$'. At all temperatures ($$\mathrm{L}_2-\mathrm{L}_1$$) is same. The correct relation is

3

MHT CET 2021 23th September Morning Shift

MCQ (Single Correct Answer)

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The temperature of a black body is increased by $$50 \%$$, then the percentage increase in the rate of radiation by the body is approximated

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MHT CET 2021 22th September Evening Shift

MCQ (Single Correct Answer)

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The emissive power of sphere of area $$0.04 \mathrm{~m}^2$$ is $$0.7 \mathrm{~k} \mathrm{~cal} \mathrm{~s}^{-1} \mathrm{~m}^{-2}$$. The amount of heat radiated in 20 second is

Questions Asked from Heat and Thermodynamics (MCQ (Single Correct Answer))

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MHT CET Subjects

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