MCQOPTIONS
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MCQOPTIONS
This section includes 5 Mcqs, each offering curated multiple-choice questions to sharpen your Electrical Engineering Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
An aeroplane of wingspan 10m flies from the equator towards the North Pole. The wings are perpendicular to the vertical component of the earths magnetic field (B = 4 10-5T). At maximum speed an emf of 96mV is induced across the wing tips. The maximum speed of the aeroplane is____________? |
| A. | 150msec-1 |
| B. | 384msec-1 |
| C. | 38.4msec-1 |
| D. | 200msec-1 |
| Answer» C. 38.4msec-1 | |
| 2. |
If current in a conductor increases then according to Lenz s law self-induced voltage will____________? |
| A. | Aid the increasing current |
| B. | Tend to decrease the amount of cur-rent |
| C. | Produce current opposite to the in-creasing current |
| D. | Aid the applied voltage |
| Answer» D. Aid the applied voltage | |
| 3. |
As per Faraday s laws of electromagnetic induction, an e.m.f. is induced in a conductor whenever it_______________? |
| A. | Lies perpendicular to the magnetic flux |
| B. | Lies in a magnetic field |
| C. | Cuts magnetic flux |
| D. | Moves parallel to the direction of the magnetic field |
| Answer» D. Moves parallel to the direction of the magnetic field | |
| 4. |
A conductor carries 125 amperes of current under 60 to a magnetic field of 1.1 tesla. The force on the conductor will be nearly______________? |
| A. | 50 N |
| B. | 120 N |
| C. | 240 N |
| D. | 480 N |
| Answer» C. 240 N | |
| 5. |
Lenz s law is a consequence of the law of conservation of__________? |
| A. | Induced current |
| B. | Charge |
| C. | Energy |
| D. | Induced e.m.f. |
| Answer» D. Induced e.m.f. | |