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SI unit of Stefan-Boltzmaan constant is ...

SI unit of Stefan-Boltzmaan constant is . . .. . . .

A

`Wm^(-2)K^(-4)`

B

`Wm^(-2)`

C

`Wm^(-2) K^(-1)`

D

`Wm^(-2)K^(-2)`

Text Solution

Verified by Experts

From stefan-Boltzman.s law
`W-A e sigma T^(4)e=1` (emissivity- unitless)
`:.(W)/(AT^(4)t)= sigma`
`:.` Units of `sigma=(J)/(m^(2)K^(4)s)`
`=(W)/(m^(2)K^(-4))`
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KUMAR PRAKASHAN-UNITS AND MEASUREMENT-SECTION -E (MULTIPLE CHOICE QUESTIONS (MCQS) (MCQS ASKED IN GUJARAT BOARD AND COMPETITIVE EXAMS)
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