A transformer is used to step down 250 V main supply to 8 V. If there are 2000 turns in the primary coil, how many turns must the secondary coil have?

Answer 1

We know, Vprimary / V secondary = No turns in primary / No of turns in secondary

or, V1 / V2 = N1 / N2

or, 250/ 8 = 2000 / N2

Thus, N2 = (2000 x 8 ) / 250

= 64