MCQOPTIONS
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MCQOPTIONS
This section includes 56 Mcqs, each offering curated multiple-choice questions to sharpen your UPSEE knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Find the length of a conductor which is moving with a velocity 0.4m/s in a magnetic field of 8T, inducing an emf of 20V. |
| A. | 50m |
| B. | 5m |
| C. | 6.25m |
| D. | 0.5m |
| Answer» D. 0.5m | |
| 52. |
If a conductor 0.2m long moves with a velocity of 0.3m/s in a magnetic field of 5T, calculate the emf induced. |
| A. | 0.3V |
| B. | 0.03V |
| C. | 30V |
| D. | 3V |
| Answer» B. 0.03V | |
| 53. |
The total number of magnetic field lines passing through an area is termed as? |
| A. | Voltage |
| B. | EMF |
| C. | Magnetic flux |
| D. | Magnetic flux density |
| Answer» C. Magnetic flux | |
| 54. |
What is the consequence of motor effect? |
| A. | Current |
| B. | Voltage |
| C. | Electromagnetic induction |
| D. | EMF |
| Answer» D. EMF | |
| 55. |
What happens to the current in a coil while accelerating a magnet inside it? |
| A. | Increases |
| B. | Decreases |
| C. | Remains constant |
| D. | Reverses |
| Answer» B. Decreases | |
| 56. |
An E.M.F. can be induced by _________ |
| A. | Change in the magnetic field |
| B. | Change in the area of cross section |
| C. | Change in angle between magnetic field and area |
| D. | Change in the magnetic field, area and angle |
| Answer» E. | |