Department of Pre-University Education, KarnatakaPUC Karnataka Science Class 12
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Transformers Are Used - Physics

MCQ

Transformers are used

Options

  • in DC circuits only

  • in AC circuits only

  • in both DC and AC circuits

  • neither in DC nor in AC circuits

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Solution

in AC circuits only

When a DC supply is provided to a transformer, there will be no change in flux with time across the coils of the transformer. So, there will be no induced emf in the secondary coil due to changing current in the primary coil. Hence, the transformer cannot operate in DC because of the violation of its working principle.

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APPEARS IN

HC Verma Class 11, Class 12 Concepts of Physics Vol. 2
Chapter 17 Alternating Current
MCQ | Q 8 | Page 329
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