Question

A transformer is an appliance for converting

• A. high current at low voltage to small current at high voltage
• B. large current at low voltage to high current at high voltage
• C. small current at high voltage to small current at low voltage
• D. large current at high voltage to small current at low voltage

Answer 1

Answer: (B)

A transformer is an electrical device that transfers energy from one circuit to another by magnetic coupling with no moving parts. An alternating current in one winding creates a time-varying magnetic flux in the core, which induces a voltage in the other windings. Transformer are used to convert between high and low voltage, to change impedance and to provide electrical isolation between circuits.