MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
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 | |
| 2. |
The formula for induced emf is __________ |
| A. | emf=B<sup>2</sup>l |
| B. | emf=Bil |
| C. | emf=Blv |
| D. | emf=B<sup>2</sup>v |
| Answer» D. emf=B<sup>2</sup>v | |
| 3. |
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 | |
| 4. |
What is the consequence of motor effect? |
| A. | Current |
| B. | Voltage |
| C. | Electromagnetic induction |
| D. | EMF |
| Answer» D. EMF | |
| 5. |
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 | |
| 6. |
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. | |