As shown in figure "B" of the illustration, if the source voltage at the branch circuit breaker is 220 VAC, what would be the applied voltage to the load? EL-0083

Correct Answer: Option A — 55 volts

The schematic in figure B illustrates a step-down transformer configuration with a 4:1 turns ratio or center-tapped secondary arrangement. When a primary source voltage of 220 VAC is applied, the electromagnetic induction across the designated secondary windings steps the voltage down to 55 VAC at the load.