A transformer of a small electrical device takes an AC voltage of 220 V as its input and supplies 12.0 V to the device. The primary winding of the transformer has 3300 turns. When the device is operating, it consumes 5.0 W. What is the current taken from the 220 V line? Voltages are in RMS value
A 26 mA
B 23mA
C 18mA
D 17mA
Solution
Correct Answer: Option B