MCQOPTIONS
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MCQOPTIONS
This section includes 8 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
emf is zero if the angle between velocity and length is _____ |
| A. | 00 |
| B. | 900 |
| C. | 2700 |
| D. | 450 |
| Answer» B. 900 | |
| 2. |
The number of cycles that occur in one second is termed as ___________ |
| A. | Waveform |
| B. | Frequency |
| C. | Amplitude |
| D. | Period |
| Answer» B. Frequency | |
| 3. |
In an A.C. generator, increase in number of turns in the coil _________ |
| A. | Increases emf |
| B. | Decreases emf |
| C. | Makes the emf zero |
| D. | Maintains the emf at a constant value |
| Answer» B. Decreases emf | |
| 4. |
An E.M.F. can be induced by ___________ |
| A. | Change in magnetic field |
| B. | Change in the area of cross section |
| C. | Change in angle between magnetic field and area |
| D. | Change in magnetic field, area and angle |
| Answer» E. | |
| 5. |
When a coil is rotated in a magnetic field, the emf induced in it? |
| A. | Is maximum |
| B. | Is minimum |
| C. | Continuously varies |
| D. | Remains constant |
| Answer» D. Remains constant | |
| 6. |
Calculate the maximum emf when the velocity is 10m/s, the length is 3m and the magnetic field density is 5T. |
| A. | 150V |
| B. | 100V |
| C. | 300V |
| D. | 0V |
| Answer» D. 0V | |
| 7. |
What should theta be in order to get maximum emf? |
| A. | 0 |
| B. | 90 |
| C. | 180 |
| D. | 45 |
| Answer» C. 180 | |
| 8. |
Which, among the following, is the correct expression for alternating emf generated? |
| A. | e=2Blusin(theta) |
| B. | e=2B<sup>2</sup>lusin(theta) |
| C. | e=Blusin(theta) |
| D. | e=4Blusin(theta) |
| Answer» B. e=2B<sup>2</sup>lusin(theta) | |