MCQOPTIONS
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MCQOPTIONS
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 | |
| 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. | |
| 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 | |
| 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 | |
| 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 | |
| 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. | |
| 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 | |
| 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>]. | |
| 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 | |
| 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)]. | |
| 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 | |
| 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 | |
| 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 | |
| 14. |
The output transformers are also named as _________ |
| A. | Audio transformers |
| B. | Power transformers |
| C. | Industrial transformers |
| D. | Electric transformers |
| Answer» B. Power transformers | |
| 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 | |