You are given a transformer that has 800 turns on its primary coil and 64 turns on its secondary coil. A voltage of 220 V is applied to the primary coil.

What is the output voltage?

17.6 V

The correct answer is Option (1) → 17.6 V

Using the transformer equation,

$\frac{V_p}{V_s}=\frac{N_p}{N_s}$

$⇒V_s=\frac{V_pV_s}{N_p}=\frac{220}{12.5}=17.6V$