Top 350+ Solved Electromagnetics MCQ Questions Answer
Q. The ratio of intensity of magnetisation to the magnetisation force is known as
a. flux density
b. susceptibility
c. relative permeability
d. none of the above
Q. The left hand rule correlates to
a. current, induced e.m.f. and direc¬tion of force on a conductor
b. magnetic field, electric field and direction of force on a conductor
c. self induction, mutual induction and direction of force on a conductor
d. current, magnetic field and direc¬tion of force on a conductor
Q. The unit of relative permeability is
a. henry/metre
b. henry
c. henry/sq. m
d. it is dimensionless
Q. The force between two long parallel conductors is inversely proportional to
a. radius of conductors
b. current in one conductor
c. product of current in two conduc¬tors
d. distance between the conductors
Q. Materials subjected to rapid reversal of magnetism should have
a. large area oib-h loop
b. high permeability and low hysteresis loss
c. high co-ercivity and high reten-tivity
d. high co-ercivity and low density
Q. Paramagnetic materials have relative permeability
a. slightly less than uuity
b. equal to unity
c. slightly more than unity
d. equal to that ferromagnetic mate rials
Q. Substances which have permeability less than the permeability of free space are knownas
a. ferromagnetic
b. paramagnetic
c. diamagnetic
d. bipolar
Q. Two infinitely long parallel conductors in vacuum anf' separated 1 metre betweencentres >rhen a current of 1 ampere flows thn. ugh each conductor, produce on each otLer 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)
Q. In the left hand rule, forefinger always represents
a. voltage
b. current
c. magnetic field
d. direction of force on the conductor
Q. Which of the following is a ferromagnetic material ?
a. tungsten
b. aluminium
c. copper
d. nickel
Q. Ferrites are a sub-group of
a. non-magnetic materials
b. ferro-magnetic materials
c. paramagnetic materials
d. ferri-magnetic materials
Q. Gilbert is a unit of
a. electromotive force
b. magnetomotive force
c. conductance
d. permittivity
Q. The working of a meter is based on the use of a permanent magnet. In order to protectthe meter functioning from stray magnetic fields
a. meter is surrounded by strong magnetic fields
b. a soft iron shielding is used
c. a plastic shielding is provided
d. a shielding of anon-magnetic material is used