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

Related Mcqs:

A perfect black body is one that_____________?

A. transmits all incident radiations B. absorbs all incident radiations C. reflects all incident radiations D. absorbs, reflects and transmits all incident radiations...

For the transmission of heat from one body to another__________?

A. temperature of the two bodies must be different B. both bodies must be solids C. both bodies must be in contact D. at least one of the bodies must have some source of heating...

By the use of which of the following, high frequency power supply for induction furnaces can be obtained ?

A. Coreless transformers B. Current transformers C. Motor-generator set D. Multi-phase transformer...

Which of the following methods is used to control temperature in resistance furnaces ?

A. Variation of resistance B. Variation of voltage C. Periodical switching on and off of the supply D. All of the above methods...

Radiations from a black body are proportional to____________?

A. T1 B. T2 C. T3 D. T*...