Induction heating process is based on which of the following principles ?

A. inside boiler furnaces
B. during melting of ice
C. through the surface of the insulted pipe carrying steam
D. from refrigerator coils to freezer of a refrigerator

A. To achieve better heating
B. To increase the life of roof refractory
C. To have better stirring action
D. To reduce problem of oxidation
E. All of the above

A. Eddy current heating
B. Arc heating
C. Induction heating
D. Dielectric heating

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

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

A. Quicker operation
B. Higher efficiency
C. Absence of flue gases
D. All of the above