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A degaussing is the process of ____ ?
A. demagnetising metallic parts
B. remagnetising metallic parts
C. removal of magnetic impurities
D. removing gases from materialsThe application of permanent magnets in ____ ?
A. motors
B. loud speakers
C. generators
D. NoneThe magnetisation and applied field in ferromagnetic materials are related ?
A. non linearly
B. parabolically
C. sinusoidally
D. linearlyThe bar magnet has ___ ?
A. monopole moment.
B. the dipole moment.
C. Both a and b
D. NoneNegative susceptibility exists for ___ ?
A. ferromagnetic substances
B. magnetic substances
C. non magnetic substances
D. diamagnetic substancesMaterials whose permeability is lower than that of open space are referred to as ?
A. bipolar
B. paramagnetic
C. diamagnetic
D. ferromagneticThe number of atoms per unit cell in a B.C.C structure is ____ ?
A. 1
B. 2
C. 5
D. 8Which of these is a topic covered by the scientific field of cryogenics ?
A. Low temperature
B. Crystal growth
C. High temperature
D. Friction and wearFor applications in electrical engineering, which of the following is the least desired feature in magnetic materials ?
A. Large hysteresis loop
B. High electrical resistivity
C. High magnetic permeability
D. None of theseIdentify the odd one out.
A. Dielectric strength
B. Dielectric strength
C. Absorptivity
D. Emissivity