A body radiates energy 5 W at a temperature of `127^(@)C` . If the temperature is increased to `927^(@)C`, then it radiates energy at the rate of

Two spheres P and Q , of same colour having radii 8cm and 2cm are maintained at temperatures of 127^(@)C . If temperature is increased to 927^(@)C , then it radiates energy at the rate of

A black body radiates 20 W at temperature 227^(@)C . If temperature of the black body is changed to 727^(@)C then its radiating power wil be

A black body radiates 20 W at temperature 227^(@)C . If temperature of the black body is changed to 727^(@)C then its radiating power wil be

A black body radiates 20 W at temperature 227^(@)C . If temperature of the black body is changed to 727^(@)C then its radiating power wil be

A black body radiates at the of W watts at a temperture T. If the temperature of the body is reduced to T//3 , it will radiate at the rate of (in Watts)

The rate of emission of radiation of a black body at temperature 27^(@)C is E_(1) . If its temperature is increased to 327^(@)C the rate of emission of radiation is E_(2) . The relation between E_(1)andE_(2) is

A black body radiates energy at the rate of E W//m at a high temperature TK . When the temperature is reduced to (T)/(2)K , the radiant energy will b