Explore topic-wise MCQs in Electrical Machines.

This section includes 3 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Machines knowledge and support exam preparation. Choose a topic below to get started.

1.

For an inductor made from magnetic core, with two air gaps of equal length g, exciting coil with 1000 turns, A=5cm 5cm and g=1cm, what will be the coil inductance?

A. 0.314H
B. 0.157H
C. 0.078H
D. 0.628H
Answer» C. 0.078H
Discussion
2.

The voltage equation for the electrical system, in an electromechanical energy conversion device is as follows:
vt=ir+Ldi/dt+i(dL/d r) r = (i)+(ii)+(iii)

A. nWhat does the (ii) and (iii) terms represent respectively?
B. transformer voltage term and speed/rotational voltage term
C. speed/rotational voltage term and transformer voltage term
D. force voltage term and transformer voltage term
E. none of the mentioned
Answer» B. transformer voltage term and speed/rotational voltage term
Discussion
3.

Torque angle is the angle between ____________

A. rotor field axis and resultant field axis
B. stator field axis and rotor field axis
C. stator field axis and mutual field axis
D. stator field axis and resultant field axis
Answer» C. stator field axis and mutual field axis
Discussion