Explore topic-wise MCQs in Electrical Machines.

This section includes 13 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.

Which of the following statements are correct for an ideal transformer?

A. I,II,III,IV
B. III,IV
C. I,III
D. I,IVView Answer
Answer» B. III,IV
Discussion
2.

Which of the following statements are incorrect for an ideal transformer?

A. I,II,III,IV
B. III,IV
C. I,II
D. I,IVView Answer
Answer» D. I,IVView Answer
Discussion
3.

Which of the following assumptions about the transformer supports the fact that the instantaneous power input and output of a transformer is equal?

A. I,II,III,IV
B. III,IV
C. I,III
D. I,IVView Answer
Answer» D. I,IVView Answer
Discussion
4.

Which of the following statement is true?

A. I
B. II
C. I,II
D. none of the mentionedView Answer
Answer» B. II
Discussion
5.

Consider a 2-winding transformer as below. If the switch is kept open then the emf induced across the secondary having transformation ratio of ‘2’ is?

A. zero
B. 2E1
C. E/2
D. E1
Answer» B. 2E1
Discussion
6.

Consider a 2-winding transformer as below. If the switch is open then the emf induced across the secondary having transformation ratio of 2 is?

A. zero
B. V1
C. V1/2
D. 2*V1
Answer» E.
Discussion
7.

Consider a 2-winding transformer as below. If the switch is open then the emf induced across the load ‘Zl’ having transformation ratio of 2 is?

A. zero
B. V1
C. V1/2
D. 2*V1
Answer» B. V1
Discussion
8.

The voltage induced at the end of primary terminals of a two winding transformer consisting of N turns is?

A. -N*dϕ/dt
B. N*dϕ/dt
C. -dϕ/dt
D. -N*dt/dϕ
Answer» B. N*dϕ/dt
Discussion
9.

Which of the following statements support the ideal transformer features?

A. I, II
B. III
C. I, III
D. I, II, IIIView Answer
Answer» B. III
Discussion
10.

CONSIDER_A_2-WINDING_TRANSFORMER_AS_BELOW._IF_THE_SWITCH_IS_OPEN_THEN_THE_EMF_INDUCED_ACROSS_THE_SECONDARY_HAVING_TRANSFORMATION_RATIO_OF_2_IS?$

A. zero
B. V1
C. V1/2
D. 2*V1
Answer» E.
Discussion
11.

I. Core flux in an ideal transformer remains constant.$

A.
B.
Answer» B.
Discussion
12.

Consider a 2-winding transformer as below. If the switch is open then the emf induced across the load ‘Zl’ having transformation ratio of 2 i?#

A. zero
B. V1
C. V1/2
D. 2*V1
Answer» B. V1
Discussion
13.

The voltage induced at the end of primary terminals of a two winding transformer consisting of N turns is

A. -N*dϕ/dt
B. N*dϕ/dt
C. -dϕ/dt
D. -N*dt/dϕ
Answer» B. N*d‚âà√¨‚àö√ò/dt
Discussion