MCQOPTIONS
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MCQOPTIONS
This section includes 553 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 551. |
An electromagnetic field exists only when there is |
| A. | an increasing current |
| B. | decreasing current |
| C. | voltage |
| D. | current |
| Answer» E. | |
| 552. |
What is the magnetomotive force (mmf) of a wire with 8 turns carrying three amperes of current? |
| A. | 2,400 At |
| B. | 240 At |
| C. | 24 At |
| D. | 2.4 At |
| Answer» D. 2.4 At | |
| 553. |
If a loop in a basic dc generator suddenly begins rotating at a faster speed, the induced voltage |
| A. | remains unchanged |
| B. | reverses polarity |
| C. | increases |
| D. | decreases |
| Answer» D. decreases | |