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Heat Capacity

Which of the ...

Question

Which of the following has highest emissive power?

A

Aluminum foil

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B

Brick

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C

Ice

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D

All of them having same emissive power

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Solution

The correct option is C Ice
Emissivity of aluminium foil = 0.04
Emissivity of brick = 0.75 - 0.93
Emissivity of ice = 0.966 - 0.985
So, ice has highest emissivity.

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