Question

What is the turns ratio i.e., transformer ratio, $n_s:n_p$, in an ideal transformer which increases ac voltage from 220 V to 33000 V?

Answer 1

Transformer ratio $=\frac{n_s}{n_p}=\frac{E_s}{E_r}=\frac{33000}{220}$
$=\frac{150}{1}=150:1$