A. induced current flow through the charge
B. hysteresis loss taking place below curie temperature
C. due to hysteresis loss as well as eddy current loss takingplace in the charge
D. none of the above factors
Related Mcqs:
- In resistance heating highest working temperature is obtained from heating elements made of_____________?
A. nickel copper
B. nichrome
C. silicon carbide
D. silver - For radiant heating around 2250°C, the heating elements are made of____________?
A. copper alloy
B. carbon
C. tungsten alloy
D. stainless steel alloy - In induction heating ___________ is abnormally high?
A. phase angle
B. frequency
C. current
D. voltage - Induction heating takes place it which of the following ?
A. Insulating materials
B. Conducting materials which are magnetic
C. Conducting materials which are non-magnetic
D. Conducting materials which may or may not be magnetic - Induction heating process is based on which of the following principles ?
A. Thermal ion release principle
B. Nucleate heating principle
C. Resistance heating principle
D. Electro-magnetic induction princi¬ple - The material of the heating element for a furnace should have___________?
A. lower melting point
B. higher temperature coefficient
C. high specific resistance
D. all of the above - For heating element high resistivity material is chosen to______________?
A. reduce the length of heating element
B. increase the life of the heating element
C. reduce the effect of oxidation
D. produce large amount of heat - In an electric room heat convector the method of heating used is______________?
A. arc heating
B. resistance heating
C. induction heating
D. dielectric heating - In the indirect resistance heating method, maximum heat-transfer takes place by____________?
A. radiation
B. convection
C. conduction
D. any of the above - Properly of low temperature co-eflficient of heating element is desired due to which of the following reasons ?
A. To avoid initial rush of current
B. To avoid change in kW rating with temperature
C. Both (A) and (B)
D. Either (A) or (B)
