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If a body having a surface area 5 cm^2 a...

If a body having a surface area `5 cm^2` and a temperature of `727^@C` radiates 300 joule of energy each minute, then emissivity is `(sigma = 5.67 10^(-8) W/m^2 sK^4)`

A

0.18

B

0.018

C

0.0018

D

0.00018

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The correct Answer is:
A
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