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The alternating voltage induced in the s...

The alternating voltage induced in the secondary coil of a transformer is mainly due to

A

a varying electric field

B

a varying magnetic field

C

the vibrations of the primary coil

D

the iron core of the transfomer

Text Solution

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The correct Answer is:
B
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NIKITA PUBLICATION-ELECTROMAGNETIC INDUCTION-MCQs
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  4. We can reduce eddy currents in the core of transformer

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  6. The efficiency of transfomer is very high because

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  7. In a lossless transformer an alternating current of 2 amp is flowing i...

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  8. A transformer connected to 220 volt line shows an output of 2A at 1100...

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  9. A power transformer is used to step up an alternating e.m.f. of 220 V ...

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  10. A step up transformer connected to a 220V AC line is to supply 22 kV f...

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  11. A transformer is employed to

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  12. The number of turns in the primary coil of a transformer is 200 and th...

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  13. A step-up transformer has transformation ratio of 3:2 what is the volt...

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  14. A step-down transformer is connected to main supply 200V to operate a ...

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  15. Voltage in the secondary coil of a transfomer does not depend upon

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  16. Large transformers, when used for some time, become hot and are cooled...

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  17. In a step-up transformer the voltage in the primary is 220 V and the c...

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  18. A transformer has 100 turns in the primary coil and carries 8A current...

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  19. In a primary coil 5A current is flowing on 220 volts. In the secondary...

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