Electromagnetism MCQs

Question 1

Which of the following type of are not very important for en applications?

Accepted Answer

Diamagnetic

Answer

Ferromagnetic

Answer

Paramagnet

Answer

None of above

Question 2

The susceptibility of param ty of the iron rod end of the iron materials ginerallylks between

Accepted Answer

10-3 and 10-5

Answer

10-3 and 10-7

Answer

10-4 and 10-8

Answer

10-2 and 10-5

Question 3

The magnetic materials exhibit the properly of magnetisation because of

Accepted Answer

all of the above

Answer

orbital motion of electrons

Answer

spin of electrons

Answer

spin of nucleus

Question 4

The attraction capacity of electromagnet will increase if the

Accepted Answer

flux density increases

Answer

core length increases

Answer

core area increases

Answer

flux density decreases

Question 5

Which of the following statements is correct?

Accepted Answer

The conductivity of ferrites is better than

Answer

The ferromagnetic materials

Answer

The conductivity of ferixes is very high

Answer

conductivity of ferromagnetic materials is better than ferrites

Question 6

In which of that of ferromagnetic materials associated with two sets of Other? ned antiparallel to each

Accepted Answer

Antiferromagnetic materials

Answer

Ferromagnetic materials

Answer

Ferrites

Answer

Ferrimagnetic materials

Question 7

Mai causes laminations tendency of fan out of repulsion amoat the end caused by force or uneven wear caused by din

Accepted Answer

both of above

Answer

of noisy solenoid are strong magnetic lines of

Answer

uneven bearing surface,

Answer

none of the above

Question 8

When a bar magnet is bent at its centre moment wil be to form the shape of L, its magnetic

Accepted Answer

1 time to original value

Answer

2 times its original value 1

Answer

times its original value2

Answer

times its original value

Question 9

An air gap is usually inserted in magnetic circuits to

Accepted Answer

prevent saturation

Answer

increase m.m.

Answer

increase the flux

Answer

none of the above