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Working principle of electric motor is t...

Working principle of electric motor is to convert …...

A

ac into dc.

B

ac into dc.

C

ac and dc mutually.

D

ac into mechanically.

Text Solution

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The correct Answer is:
D
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KUMAR PRAKASHAN-ELECTROMAGNETIC INDUCTION-Section D MCQs (From DARPAN Based on Textbook )
  1. One electric generator produces power at 220 V potential difference. I...

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  2. In one A.C. generator, brushes connected with slip rings become positi...

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  3. Working principle of electric motor is to convert …...

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  4. Voltage obtained in one A.C. generator V=V0 cos omegat . If V0 = 10 vo...

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  5. A circular coil with radius 10 cm and 10 no. of tightly wound identica...

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  6. A generator produces a voltage that is given by V = 240 sin 120t, wher...

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  7. If an A.C. current of frequency 50 Hz is flowing through a conducting ...

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  8. A coil having N turns and area A is rotating in uniform magnetic field...

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  9. In an AC generator, the brushes in contact with the step rings alterna...

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  10. The equation of A.C. voltage is given by V = 158 sin 200pit. The value...

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  11. A coil with resistance 8 Omega and having 8 turns is connected with a...

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  12. For the situation shown in the figure, what should be the value of for...

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  13. For one coil, kept in 1T external magnetic field, current passing thro...

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  14. As shown in figure a bar magnet suspended by a conducting spring is ma...

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  15. Length of one metal rod is 1m. 2T is the intensity of the magnetic fie...

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  16. The variation of induced emf E with time t in a coil when a short bar ...

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  17. Current of 2A passing through a coil of 100 turns gives rise to a magn...

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  18. A graph shown in the figure represents the variation of uniform magnet...

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  19. In AC generator, induced emf is zero at time t = 0. The induced emf at...

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  20. As shown in fig. a metal ring is held horizontally and a bar magnet is...

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