Two identical spheres A and B are suspended in an air chamber which is maintained at a temperature
Channel: Doubtnut
Date: 2020-07-26

Two identical spheres A and B are suspended in an air chamber which is maintained at a temperature of `50^@C`. Find the ratio of the heat lost per second from the surface of the spheres if  a. A and B are at temperatures `60^@C` and `55^@C`, respectively.  b. A and B are at temperatures `250^@C` and `200^@C`, respectively.