Question

A transformer has a primary coil with 600 turns and a secondary coil with 300 turns. If the output voltage is 75 volts, what is the input voltage? A. 8 volts B. 150 volts C. 640 volts D. 600 volts

Answer 1

We know, Ep = Es * Np / Ns
Here, Es = 75 V
Np = 600
Ns = 300

Substitute their values,
Ep = 75 * 600/300
Ep = 75 * 2
Ep = 150 Volts

In short, Your Answer would be Option B

Hope this helps!