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The ratio of the turns in the primary an...

The ratio of the turns in the primary and secondary coils of transformer is1: 9. The ratio of the current in the primary to secondary is

A

`9:1`

B

`3:1`

C

`1:1`

D

`1:9`

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CHETANA PUBLICATION-Electromagnetic Induction-EXERCISE
  1. The primary winding of transformer has 200 turns and its secondary win...

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  2. A transformer is used to reduce the main supply of 220 V to11 V. If th...

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  3. The ratio of the turns in the primary and secondary coils of transform...

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  4. A current in one coil changes from 5 A to 3 A in 0.2 sec and the co-ef...

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  5. The current in the coil changes from 3A to 6 A in 3sec. If the induced...

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  6. If south pole of the magnet is moved towards the coil then the nearer ...

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  7. The current in the choke coil decreasing at the rate of 3 A//s and cho...

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  8. The phenomenon of producing an induced e.m.f. in a conductor due to th...

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  9. Faraday's laws of electromagnetic induction is related to

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  10. To induce an e.m.f. in a coil, the magnetic flux

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  11. The co-efficient of self induction of a coil is the ratio of

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  12. The S.I. unit of inductance Henry can be written as

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  13. The number of turns in primary and secondary coil of transformer are 1...

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  14. Lenz's law is in accordance with law of conservation of

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  15. Magnetic flux associated with area element ds kept in magnetic inducti...

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  16. Induced e.m.f. produced in the coil is 4mV. What is the change in flux...

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  17. Foucault's current is also

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  18. What is SI unit of magnetic flux density?

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  19. Why induced emf is called back emf?

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  20. What is SI unit of self inductance?

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