The No-load current of Transformer is usually what percent of its full load | Electrical Transformer MCQ#1

Statement: The no-load current of the transformer is usually what percent of its full load value:

  1. 2 to 5%
  2. 5 to 10%
  3. 10 to 20 %
  4. 0%

Correct answer: 1. 2 to 5%


The no-load current in the transformer is the current that results due to hysteresis and eddy current losses in the core. The total no-load current is sum of three components:

  1. Magnetization current
  2. Hysteresis losses
  3. Eddy current losses

Collectively it is named as excitation current

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