Physics And Measurement Question 316

Question: The unit of Stefan’s constant σ is

[ MP PMT 1992; CBSE PMT 2002]

Options:

A) Wm2K1 .

B) Wm2K4

C) Wm2K4

D) Wm2K4

Show Answer

Answer:

Correct Answer: C

Solution:

Stefan’s law is E=σ(T4)

therefore σ=ET4 where, E= EnergyArea×Time =Wattm2

σ=Watt-m2K4=Wattm2K4



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