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Quantity that remains unchanged in a tra...

Quantity that remains unchanged in a transformer is

A

voltage

B

current

C

frequency

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
C
A transformer does not change the frequency of ac.
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NCERT FINGERTIPS ENGLISH-ALTERNATING CURRENT -Assertion And Reason
  1. Quantity that remains unchanged in a transformer is

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  2. Assertion : An alternating current does not show any magnetic effect. ...

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  3. Assertion: Average value of AC over a complete cycle is always zero. ...

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  4. Assertion : The capacitive reactance limits the amplitude of the curre...

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  5. Assertion : The inductive reactance limits amplitude of the current in...

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  6. Assertion : In series LCR resonance circuit, the impedance is equal to...

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  7. Assertion : In a purely inductive or capacitive circuit, the current i...

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  8. Assertion : The only element that dissipates energy in an ac circuit i...

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  9. Assertion : The power in ac circuit is minimum if the circuit has only...

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  10. Assertion : Resonance is exhibited by a circuit only if both L and C a...

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  11. Assertion : When a current flows in the coil of a transformer then its...

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  12. Assertion : An ideal transformer does not vary the power. Reason : A...

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  13. Assertion : A step-up transformer changes a low voltage into a high vo...

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  14. Assertion : A given transformer can be used to step-up ot step-down th...

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  15. Assertion : A laminated core is used in transformers to increase eddy ...

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  16. Assertion : A transformer cannot work on dc supply. Reason : dc chan...

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