If a motor is direct-on-line started with the stator winding star connected, it will only take a fraction of the starting current that it would take if the windings were delta connected. What is that fraction?

Correct Answer: Option B — 1/3

When a three-phase motor is connected in star, the voltage across each winding is 1/√3 of the line voltage. Since torque and current are proportional to the square of the voltage, the starting current in star is 1/3 of the current that would be drawn in a delta connection.