Explore topic-wise MCQs in Electrical Engineering.

This section includes 56 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.

51.

The initial rate of rise of current through a coil of inductance 10 H when suddenly connected to a D.C. supply of 200 V is ___________Vs?

A. 50
B. 20
C. 0.05
D. 500
Answer» C. 0.05
Discussion
52.

Point out the wrong statement. Magnetic leakage is undesirable in electric machines because it?

A. Lowers their power efficiency
B. Increases their cost of manufacture
C. Leads to their increased weight
D. Produces fringing
Answer» B. Increases their cost of manufacture
Discussion
53.

A ferrite core has less eddy current loss than an iron core because

A. Ferrites have high resistance
B. Ferrites are magnetic
C. Ferrites have low permeability
D. Ferrites have high hysteresis
Answer» E.
Discussion
54.

When both the inductance and resistance of a coil are doubled the value of

A. Time constant remains unchanged
B. Initial rate of rise of current is doubled
C. Final steady current is doubled
D. Time constant is halved
Answer» B. Initial rate of rise of current is doubled
Discussion
55.

Those magnetic materials are best suited for making armature and transformer cores which have ________permeability and _________hysteresis loss.

A. High, high
B. Low, high
C. High, low
D. Low, low
Answer» D. Low, low
Discussion
56.

While comparing magnetic and electric circuits, the flux of magnetic circuit is compared with which parameter of electrical circuit?

A. E.M.F.
B. Current
C. Current density
D. Conductivity
Answer» C. Current density
Discussion