1.

If the temperature of body is increased by 10% the percentage increase in the emitted radiation with be :

Answer»

`46%`
`40%`
`30%`
`80%`

SOLUTION :Here `EpropT^(4)`
`:.(E_(2)-E_(1))/(E_(1))xx100=(T_(2)^(4)-T_(1)^(4))/(T_(1)^(4))xx100`
`((110)^(4)-(100)^(4))/((100)^(4))xx100`
`=[(1.1)^(4)-1]xx100`
`=(1.46-1)xx100=46%`
Correct choice is (a).


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