Radiations from a black body are proportional to____________?

Related Mcqs:

Which of the following methods of heating is not dependent on the frequency of supply ?

A. Induction heating B. Dielectric heating C. Electric resistance heating D. All of the above...

By which of the following methods the temperature inside arc nace can be varied ?

A. By disconnecting some of the heating elements B. By varying the operating voltage C. By varying the current through heating elements D. By any of the above method...

In an electric room heat convector the method of heating used is______________?

A. arc heating B. resistance heating C. induction heating D. dielectric heating...

Radiant heating is used for which of the following ?

A. Annealing of metals B. Melting of ferrous metals C. Heating of liquids in electric kettle D. Drying of paints and varnishes...

Direct arc furnaces have which of the following power factors ?

A. Unity B. Low, lagging C. Low, leading D. Any of the above...