Here,
let the number of winding in the secondary coil be x , n2
then the number of winding in primary coil , n1 = 150 x
seconda voltage , v2 = 220 V
Primary voltage v1 = ?
We know
\(\frac{v_2}{v_1}=\;\frac{n_2}{n_1}\)
or, v1 = 150 * 220
= 33000 volt.
therefore, the input emf in the primary winding is 33000 V if emf generated in the secondary winding is 220 V.