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KCET2009PhysicsThermal Properties of Matter

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

Options

  1. A81 E
  2. B9E
  3. C3 E
  4. D27 E

Correct answer

A. 81 E

Step-by-step solution

According to Stefan's law E T⁴ E ^ E = ( 3 ~T ~T )⁴ or E ^ =81 E

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