Electromagnetic Field Theory Objective Questions and Answers Pdf - 1

Question: 1

Conservative properties are applicable only to

(A) time varying electric and magnetic field

(B) time varying magnetic field

(C) time varying electric field

(D) electrostatic field

Ans: D

electrostatic field

Question: 2

The magnitude of the induced emf in a conductor depends upon the

(A) rate of change of flux linkage

(B) flux density of the magnetic field

(C) amount of flux cut

(D) amount of flux linkage

Ans: A

rate of change of flux linkage

Question: 3

Image theory is applicable to problems involving

(A) magnetostatic fields only

(B) electrostatic field only

(C) both electrostatic and magnetostatic fields

(D) neither electrostatic nor magnetostatic fields

Ans; B

electrostatic field only

Question: 4

The main purpose of choke is

(A) to pass low frequencies

(B) to block low frequencies

(C) to pass high frequencies

(D) none of the above

Ans: A

to pass low frequencies

Question: 5

The attraction capacity of electromagnet will increase if the

(A) flux density decreases

(B) flux density increases

(C) core length increases

(D) core area increases

Ans: B

flux density increases

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