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Define emissive power and coefficient of emmision of a body.
Appears in these question papers
A metal sphere cools at the rate of 4°C / min. when its temperature is 50°C. Find its rate of cooling at 45°C if the temperature of surroundings is 25°C.
A metal ball cools from 64 °C to 50 °C in 10 minutes and to 42 °C in next 10 minutes. The ratio of rates of fall of temperature during the two intervals is _______.
The susceptibility of magnesium at 200 K is 1-8 x 10-5. At what temperature will the susceptibility decrease by 6 x 10"6?
The dimensions of emissive power are
(A) [M1 L-2 T-3 ]
(B) [M1 L2 T-3 ]
(C) [M1 L0 T-3 ]
(D) [M1 L0 T-2 ]
Answer the following:
There were two fixed points in the original Celsius scale as mentioned above which were assigned the number 0 °C and 100 °C respectively. On the absolute scale, one of the fixed points is the triple-point of water, which on the Kelvin absolute scale is assigned the number 273.16 K. What is the other fixed point on this (Kelvin) scale?