If the primary winding of a voltage transformer is connected to a steady DC source, self-inductance and mutual inductance is not possible. As a result, what part of the transformer will result in current overload?

Correct Answer: Option B — primary coil

Direct current flowing through a transformer primary creates a steady magnetic field without changing flux. Without alternating flux, no counter-electromotive force (back EMF) is induced, causing the primary coil to act as a low resistance dead short and overheat.