In a transformer, even when there is no load connected, there will be some small current flow known as _____ current.

A) excitation
B) primary
C) secondary
D) hysteresis

Excitation Current

(1) The DC used to produce electromagnetism in the fields of a DC motor or generator, or in the rotor of an alternator or synchronous motor; (2) The AC that flows in the primary of a transformer with no load connected.

Primary

Referring to the first or main element of a system or device, such as the primary coil in a transformer.

Secondary

Refers to the coil or winding in a transformer that receives energy from the primary winding and delivers it to the load.