Top 350+ Solved Electromagnetics MCQ Questions Answer

a. 2

b. 4

c. 6

d. 8

a. 2 at

b. 4 at

c. 6 at

d. 10 at

a. the highest permeability of the iron rod

b. the lowest permeability of the iron rod

c. the permeability at the end of the iron rod

d. the permeability almost in non-magnetised state

a. it assures a position right angle to magnetic field

b. it starts rotating

c. it assures a position which follows a line of magnetic flux

d. none of the above

a. a line vertical to the flux lines

b. the mean length of a ring shaped coil

c. a line of magnetic flux in a non-uniform field

d. a line of magnetic flux which does not follow the designed path

a. the dipole moment

b. monopole moment

c. (a) and (b) both

d. none of the above

a. silver

b. copper

c. silver and copper

d. iron

a. ferromagnetic

b. paramagnetic

c. diamagnetic

d. none of the above

a. kt3 and 1ct6

b. 1ct3 and 1ct7

c. kt4 and kt8

d. 10"2 and kt5

a. diamagnetic materials

b. ferrimagnetic materials

c. antiferromagnetic materials

d. antiferrimagnetic materials

a. core length increases i

b. core area increases

c. flux density decreases

d. flux density increases

a. the conductivity of ferrites is better than ferromagnetic materials

b. the conductivity of ferromagnetic materials is better than ferrites

c. the conductivity of ferrites is very high

d. the conductivity of ferrites is same as that of ferromagnetic materials

a. loud-speakers

b. generators

c. motors

d. all of the above

a. strong tendency of fan out of lami-nations at the end caused by repul¬sion among magnetic lines of force

b. uneven bearing surface, caused by dirt or uneven wear between moving and stationary parts

c. both of above

d. none of the above

a. heating

b. hammering

c. by inductive action of another magnet

d. by all above methods