Saved Bookmarks
| 1. |
A body is placed in an insulating container at temperature 227^(@)C. In order to keep its temperature 727^(@)C, power of 60 W is required, the power required to keep its temperature 1227^(@)C will be : |
|
Answer» 304 `(E_(1))/(E_(2))=(T_(1)^(4)-T_(0)^(4))/(T_(2)^(4)-T_(0)^(4))` `(60)/(E_(2))=((1000)^(2)-(5000)^(4))/((1500)^(4)-(500)^(4))=(16-1)/(81-1)=(15)/(80)` or `E_(2)=(60xx80)/(15)=320W` Correct choice is (b). |
|