When secondary of a current transformer is open-circuited its iron core will be
A)hot because of heavy iron losses taking place in it due to high flux density
B)hot because primary will carry heavy current
C)cool as there is no secondary current
D)none of above will happen

Question

Quizplus · Accepted Answer

When the secondary of a current transformer is open-circuited, the impedance is essentially infinite, leading to a very high flux density in the core. This results in heavy iron losses, which cause the core to heat up.

When Secondary of a Current Transformer Is Open-Circuited Its Iron