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The number of turns in primary and secon...

The number of turns in primary and secondary coil of transformer are 1000 to 5000 and 90 V ac is applied to primary, hence the voltage at the secondary is

A

90V

B

450V

C

`90/5V`

D

`90/25V`

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CHETANA PUBLICATION-Electromagnetic Induction-EXERCISE
  1. To induce an e.m.f. in a coil, the magnetic flux

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

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

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

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

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

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

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  8. Foucault's current is also

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  9. What is SI unit of magnetic flux density?

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  10. Why induced emf is called back emf?

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  11. What is SI unit of self inductance?

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  12. Write a short note on generator.

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  13. State Faraday's laws of electromagnetic induction.

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  14. A straight conductor is moving with a velocity of 18 km//hr at right a...

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  15. The primary of transformer has 5000 turns and works on 400V and 100 Wa...

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  16. Define mutual induction state its unit and dimension

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  17. What are eddy currents? State applications of eddy currents?

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  18. Explain why the inductance of two coils connected in parallel is less ...

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  19. The value of mutual inductance of two coils is B 10 mH. If the current...

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  20. Derive the expression for self inductance of a solenoid.

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