Question

The number of turns in primary and secondary windings of a transformer are 1000 and 100 respectively. If 200 V DC voltage is applied across the primary terminal, then the voltage across the secondary terminal is

• A. 22 V
• B. 2200 V
• C. 220 V
• D. 0 V

Answer 1

The correct option is D

0 V

A transformer is a device that changes an alternating potential difference from one value to another value by using the principle of electromagnetic induction. A transformer consists of a soft iron core with two coils wound around it which are not connected to one another.

Here, as the primary terminals are connected to a 200 V DC voltage, which produces direct current (DC). So, there would be no voltage across the secondary terminal.