Four amperes of current exist in the primary coil of a transformer. The voltage across the primary coil is 120 V. What is the power output of the secondary coil?
A)30 W
B)120 W
C)480 W
D)960 W
E)need more information

Question

Quizplus · Accepted Answer

The power output of the secondary coil is given by the formula:
Power = Current x Voltage
Since the transformer is ideal, the power input in the primary coil is equal to the power output in the secondary coil. Thus,
Power output = Power input = 4 A x 120 V = 480 W. Therefore, the correct answer is option C.

Four Amperes of Current Exist in the Primary Coil of a Transformer