The transformers operate at ______ power factor when lightly loaded?

The transformers operate at ______ power factor when lightly loaded?

Right Answer is:

Poor

What is Force, Moment of Force?

SOLUTION

We know that the total reactance of a transformer is Nφ/I.

where I is the load current.

The larger the load current, the smaller will be the inductance or reactance (2πfL).

Hence, the overall reactance of a transformer decreases with the increase in load. That is why transformers operate at poor power factor when lightly loaded.

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