If the illustrated device in figure "B" has a step-up ratio of 10 to 1 what voltage would be measured at the secondary shortly after the primary of the device is connected to 110 volts DC with a current of 12 amps? Illustration EL-0055

Correct Answer: Option D — 0 volts

Transformers operate strictly on electromagnetic induction requiring alternating current (AC) to produce a changing magnetic flux. When connected to a direct current (DC) source, the magnetic field is constant, inducing no secondary voltage after initial transient charging, resulting in zero volts.