1.

The rectangular surface of area 8cm xx 4cm of a black body at a temperature of 127^(@)C emits energy at rate of E per second. If the length and breadth are reduced to half of its initial value and the temperature is raised to 327^(@)C, the rate of emission of energy will be

Answer»

`((3E)/(8))`
`((9E)/(16))`
`((81E)/(16))`
`((81E)/(64))`

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