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Question

Transformers are used in
  1. DC Circuits
  2. High power circuits
  3. AC Circuits
  4. None of these


Solution

The correct options are
B High power circuits
C AC Circuits
Transformers are used in AC circuits to step up or step down voltage. It works on the principle of mutual induction. In DC circuits, since the current is constant, induction cannot happen. Therefore, inductors are not used in DC circuits. In case of high power circuits, transformers are used.

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