Iron loss of a transformer can be measured by
A)low power factor wattmeter
B)unity power factor wattmeter
C)frequency meter
D)any type of wattmeter

Question

Quizplus · Accepted Answer

Iron loss in a transformer, which includes hysteresis and eddy current losses, is typically measured under no-load conditions with a low power factor wattmeter. This is because the iron loss is almost constant and independent of the load, and the power factor at no-load (where only iron loss and a small amount of copper loss due to no-load current are present) is very low.

Iron Loss of a Transformer Can Be Measured by