Explore topic-wise MCQs in Transformers.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Transformers knowledge and support exam preparation. Choose a topic below to get started.

1.

Relative voltage ratio curve for an output transformer is _______________

A. Circular
B. Straight line
C. Bell shaped
D. Irregular curve
Answer» D. Irregular curve
Discussion
2.

What is the gain of the transformer in low-frequency region?

A. [N2/N1] [RL ‘/(R+RL’)].
B. [N2/N1] [RL ‘/(R+RL’+jωL)].
C. AH=A0/ [1+(ω/ ωH)2].
D. AL=A0/ [1+(ω/ ωL)2]1/2
Answer» E.
Discussion
3.

When series leakage inductances are not ignored but shunt inductances are considered in parallel then the region is called as _____________

A. low-frequency region
B. high-frequency region
C. mid-frequency region
D. ultra high-frequency region
Answer» B. high-frequency region
Discussion
4.

WHEN_SERIES_LEAKAGE_INDUCTANCES_ARE_NOT_IGNORED_BUT_SHUNT_INDUCTANCES_ARE_CONSIDERED_IN_PARALLEL_THEN_THE_REGION_IS_CALLED_AS______________?$

A. low-frequency region
B. high-frequency region
C. mid-frequency region
D. ultra high-frequency region
Answer» B. high-frequency region
Discussion
5.

Relative voltage ratio curve for an output transformer is _______________$

A. Circular
B. Straight line
C. Bell shaped
D. Irregular curve
Answer» D. Irregular curve
Discussion
6.

What is the gain of the transformer in low-frequency region?$

A. [N<sub>2</sub>/N<sub>1</sub>] [R<sub>L</sub> ‘/(R+R<sub>L</sub>’)].
B. [N<sub>2</sub>/N<sub>1</sub>] [R<sub>L</sub> ‘/(R+R<sub>L</sub>’+jωL)].
C. A<sub>H</sub>=A<sub>0</sub>/ [1+(ω/ ωH)<sup>2</sup>].
D. A<sub>L</sub>=A<sub>0</sub>/ [1+(ω/ ωL)<sup>2</sup>]<sup>1/2</sup>
Answer» E.
Discussion
7.

Phase angle characteristic of an output transformer is ____________

A. Curve increasing towards high-frequency region
B. Curve increasing towards low-frequency region
C. Curve increasing towards mid-frequency region then decreasing
D. Can’t define
Answer» B. Curve increasing towards low-frequency region
Discussion
8.

What is the gain of the transformer in high-frequency region?

A. [N<sub>2</sub>/N<sub>1</sub>] [R<sub>L</sub> ‘/(R+R<sub>L</sub>’)].
B. [N<sub>2</sub>/N<sub>1</sub>] [R<sub>L</sub> ‘/(R+R<sub>L</sub>’+jωL)].
C. A<sub>H</sub>=A<sub>0</sub>/ [1+(ω/ ωH)<sup>2</sup>].
D. A<sub>L</sub>=A<sub>0</sub>/ [1+(ω/ ωL)<sup>2</sup>]<sup>1/2</sup>
Answer» C. A<sub>H</sub>=A<sub>0</sub>/ [1+(‚âà√¨‚àö¬¢/ ‚âà√¨‚àö¬¢H)<sup>2</sup>].
Discussion
9.

When series leakage inductances are not ignored but shunt inductance is an effective open circuit then the region is called as _____________

A. Low-frequency region
B. High-frequency region
C. Mid-frequency region
D. Ultra high-frequency region
Answer» C. Mid-frequency region
Discussion
10.

What is the gain of the transformer in mid-band region?

A. [N<sub>2</sub>/N<sub>1</sub>] [R<sub>L</sub> ‘/(R+R<sub>L</sub>’)].
B. [N<sub>2</sub>/N1] [RL ‘/(R+R<sub>L</sub>’+jωL)].
C. AH=A0/ [1+(ω/ ωH)<sup>2</sup>]<sup>1/2</sup>
D. AL=A0/ [1+(ω/ ωL)<sup>2</sup>]<sup>1/2</sup>
Answer» B. [N<sub>2</sub>/N1] [RL ‚Äö√Ñ√∂‚àö√ë‚àö‚â§/(R+R<sub>L</sub>‚Äö√Ñ√∂‚àö√ë‚àö¬•+j‚âà√¨‚àö¬¢L)].
Discussion
11.

When series leakage inductances are ignored then the region is called as _____________

A. Low-frequency region
B. High-frequency region
C. Mid-frequency region
D. Ultra high-frequency region
Answer» D. Ultra high-frequency region
Discussion
12.

Why frequency scale is logarithmic?

A. Frequency range is very small for these transformers
B. Frequency range is very large for these transformers
C. Frequency used is negligible
D. Can’t say
Answer» C. Frequency used is negligible
Discussion
13.

Which of the following is the major requirement for the transformers used for electronic purposes?

A. Perfect DC isolation
B. Maximum efficiency
C. Constant amplitude voltage gain
D. Perfect DC isolation , maximum efficiency and constant voltage gain
Answer» D. Perfect DC isolation , maximum efficiency and constant voltage gain
Discussion
14.

The output transformers are also named as _________

A. Audio transformers
B. Power transformers
C. Industrial transformers
D. Electric transformers
Answer» B. Power transformers
Discussion
15.

Output transformers are also called for __________

A. Maximum efficiency
B. Maximum power
C. Maximum output
D. Maximum efficiency, power and output
Answer» C. Maximum output
Discussion