Physics Questions and Answers
| 193. |
For a transversely vibrating string the frequency of vibration is directly proportional to |
| |
- A. the load
- B. its linear density
- C. its length
- D. none of these
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| 194. |
Which one of the following device converts electrical energy into mechanical energy |
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- A. transformer
- B. inductor
- C. dynamo
- D. electric motor
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| 195. |
Substances which lose their electrical resistances at very low temperature are called |
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- A. semi conductors
- B. super conductors
- C. good conductors
- D. dielectrics
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| 196. |
When two resistors, each of value 10 ohms, are connected in parallel, what is the effective value of the combination? |
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- A. 6 ohms
- B. 7 ohms
- C. 4 ohms
- D. 5 ohms
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