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A transformer changes the voltage...

A transformer changes the voltage

A

without changing the current and frequency

B

without changing the current but changes the frequency

C

without changing the frequency but changesf the current

D

without changing the frequency as well as the current

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NARAYNA-ALTERNATING CURRENT-C.U.Q
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  2. A step up transformer is used to

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  3. A transformer changes the voltage

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  4. A step up transformer is connected on the primary side to a rechargabl...

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  5. The ratio of primary voltage to secondary voltage in a transformer is ...

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  6. In a step down transformer, the number of turns in the primary is alwa...

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  7. The transformer ratio of a step up transformer is

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  8. A setup transformer develops 440 V in secondary coil for an input of 2...

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  9. Assertion (A) : If changing current is flowing through a machine with ...

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  10. Transformers are used

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  11. The magnitude of the e.m.f. across the secondary of a transformer does...

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  12. For an ideal transformer ratio of output ot the input power is always

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  13. Consider the following two statements A and B and identify the correct...

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  14. Statement (A) : Flux leakage in a transformer can be minimized by wind...

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  15. Statement (A) : In high current low voltage windings of a transformer ...

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  16. Statement (A) : Step up transformer converts low voltage, high current...

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  17. To reduce the iron losses in a transformer, the core must be made of a...

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  18. Maximum efficiency of a transformer depends on

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  19. For an LCR series circuit with an aac source of angular frequency omeg...

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  20. The value of current in tow series LCR circuits at resonance is same, ...

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