A.more than 1
B.1
C.less than 1
D.0.5
Related Mcqs:
- When a body is in thermal equilibrium with its surroundings, the absorptivity and the emissivity of the body are same. This Law is known as
- The emissivity of a body will be equal to absorptivity when
- At all wavelengths and temperatures the monochromatic emissivity of a white body is equal to
- When metallic surfaces are oxidized the emissivity
- Emissivity and absorptivity of a surface are equal for radiation
- The statement that the emissivity and absorptivity of a surface is surrounded by its own temperature are the same for both monochromatic and total radiation, is known as
- Emissivity of oil flames is
- A body cools from 90?C to 80?C in 5 minutes. Under the same external conditions to cool from 80?C to 70?C the body will take
- A body cools from 80?C to 70?C in 10 minutes. The time taken by the body for further cooling to 60?C will be
- Body A is kept in contact with body B. Heat will flow from A to B, if
