# According of Kirchhoff’s law _____ ? with Answer - Mechanical Engineering Mcqs | TestPrep

> Solved MCQ: According of Kirchhoff’s law _____ ? Correct Answer: E. ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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# According of Kirchhoff’s law _____ ?

Direct Answer & Quick Reference

The correct option is **E. ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body**.

A. radiant heat is proportional to fourth power of absolute temperature

B. emissive power depends on temperature

C. emissive power and absorptivity are constant for all bodies

D. ratio of emissive power to absorptive power is maximum for perfectly black body

E. ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body **(Correct Answer)**

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Verified Key: E. ratio of emissive power to absorptive power for all bodies is same and is equal to the emissive power of a perfectly black body
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