When voltage is stepped up in a transformer, current is stepped down. But Ohm's law tells us that greater voltage means greater current, not less current. How then can current be lower when voltage is increased?
A)Current in the secondary is lower when compared to the greater current drawn by the primary.
B)Ohm's law applies to the circuit connected to the secondary, not to the transformer.
C)both of these
D)neither of these

Question

Quizplus · Accepted Answer

When voltage is stepped up in a transformer, the impedance in the secondary winding increases, which results in a decrease in current flow. Ohm's law still applies to the circuit connected to the secondary, but it is affected by the increased impedance of the secondary winding. Therefore, option B is partially correct. The primary winding draws more current to compensate for the lower current in the secondary, hence option A is also correct. Therefore, option C is the best choice.

When Voltage Is Stepped Up in a Transformer, Current Is