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The amount of heat energy radiated by a ...

The amount of heat energy radiated by a metal at temperature T is E. When the temperature is increased to 3T, energy radiated is

A

81 E

B

9 E

C

3 E

D

27E

Text Solution

Verified by Experts

The correct Answer is:
A
According to Stefan's law
Rate of energy radiated `prop("temperature")^(4)`
`:.E/(E')=(T/(3T))^(4)=1/81` or `E'=81E`
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