When the primary of a transformer is connected to power but there is no load connected to the secondary, current is limited by the inductive reactance of the primary.

Question

Quizplus · Accepted Answer

When no load is connected to the secondary of a transformer, the inductive reactance of the primary limits the current. This is because no load on the secondary means there is no magnetic flux being created by the secondary winding, causing the magnetic field in the core to collapse, which in turn induces a voltage in the primary coil. This voltage induces a current in the primary coil, which is limited by the inductive reactance of the primary.

When the Primary of a Transformer Is Connected to Power