What will happen If DC supply is given to a transformer | Electrical Transformer MCQ#2

What will happen If dc supply is given to a transformer:

  1. It will provide constant DC at the output
  2. Its primary winding will burn
  3. It will not provide secondary voltage
  4. Its secondary winding will burn

Correct answer: 2. Its primary winding will burn

Explanation: When DC supply is given to transformer its primary winding will burn away

A constant dc source connected to the primary of transformer will have zero EMF. The constant current creates zero induced emf.

As a result transformer primary will behave as a short circuit and heavy current will flow through the primary which will, in turn, burn the windings.

More Transformer MCQ:

  1. The No-load current of Transformer is usually what percent of its full load

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