| 1 |
When did Michael Faraday discover Electromagnetic induction? |
- A. 1841
- B. 1831
- C. 1821
- D. 1811
|
| 2 |
The turn ratios of a transformer is 10. It means. |
- A. I<sub>s</sub> = 10I<sub>p</sub>
- B. N<sub>s</sub> = N<sub>p</sub>
- C. N<sub>s</sub> = 10 N<sub>p</sub>
- D. V<sub>s</sub> =V<sub>p</sub> /10
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| 3 |
The coil of a transformer which is connected to A.C is called: |
- A. Primary coil
- B. Secondary coil
- C. Field coil
- D. Armature coil
|
| 4 |
The direction of induced e.m.f. in a circuit is in accordance with conservation of. |
- A. Mass
- B. Charge
- C. Momentum
- D. Energy
|
| 5 |
According to Fleming's left hand rule the direction of force on the conductor is given by: |
- A. Thumb
- B. Fore finger
- C. Middle finger
- D. None of these
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| 6 |
<p class="MsoNormal">A positive electric charge:<o:p></o:p></p> |
- A. <p class="MsoNormal">Attracts other positive charge<o:p></o:p></p>
- B. <p class="MsoNormal">Repels other positive charge<o:p></o:p></p>
- C. <p class="MsoNormal">Attract a neutral charge<o:p></o:p></p>
- D. <p class="MsoNormal">Repels a neutral charge<o:p></o:p></p>
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| 7 |
Which device is used to increases / decreases A.C Voltage? |
- A. Electric motor
- B. Transformer
- C. A.C Generator
- D. Solenoid
|
| 8 |
Transformer which increase voltage is called. |
- A. Step-up transformer
- B. Step down transformer
- C. D.C.Moter
- D. A.C.genrator
|
| 9 |
The force on a current carrying conductor is maximum if angle between field and conductor is: |
- A. 0<sup>o</sup>
- B. 90<sup>o</sup>
- C. 180<sup>o</sup>
- D. 45<sup>o</sup>
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| 10 |
<p class="MsoNormal">To see from submarine and the ship at the surface of water,
we use:<o:p></o:p></p> |
- A. <p class="MsoNormal">Telescope<o:p></o:p></p>
- B. <p class="MsoNormal">Microscope<o:p></o:p></p>
- C. <p class="MsoNormal">Periscope<o:p></o:p></p>
- D. <p class="MsoNormal">Prism<o:p></o:p></p>
|