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.Management Sciences
Category: Magnetism and Electromagnetism
Reciprocal of permeability is____________?
A. reluctivity
B. susceptibility
C. permittivity
D. conductance
The unit of relative permeability is_____________?
A. henry/metre
B. henry
C. henry/sq. m
D. it is dimensionless
For which of the following materials the net magnetic moment should be zero ?
A. Diamagnetic materials
B. Ferrimagnetic materials
C. Antiferromagnetic materials
D. Antiferrimagnetic materials
Which of the following is expected to have the maximum permeability ?
A. Brass
B. Copper
C. Zinc
D. Ebonite
Core of an electromagnet should have____________?
A. low coercivity
B. high susceptibility
C. both of the above
D. none of the above
Two infinitely long parallel conductors in vacuum any separated 1 metre between centers >then a current of 1 ampere flows the. uk each conductor, produce on each other a force of_________________?
A. 2 x 1(T2 N/m)
B. 2 x KT3 N/m
C. 2 x 10″5 N/m
D. 2x 1(T7 N/m)
When an iron piece is placed in a magnetic field_____________?
A. the magnetic lines of force will bend away from their usual paths in order to go away from the piece
B. the magnetic lines of force will bend away from their usual paths in order to pass through the piece
C. the magnetic field will not be affected
D. the iron piece will break
The Biot-savart’s law is a general modification of_______________?
A. Kirchhoffs law
B. Lenz’s law
C. Ampere’s law
D. Faraday’s laws
The susceptibility of paramagnetic materials generally lies between____________?
A. KT3 and 1CT6
B. 1CT3 and 1CT7
C. KT4 and KT8
D. 10″2 and KT5
What will be the magnetic potential difference across the air gap of 2 cm length in magnetic field of 200 AT/m ?
A. 2 AT
B. 4 AT
C. 6 AT
D. 10 AT
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