Question

A transformer is designed to provide 6 V from a 150 V supply. If the primary coil has 1000 turns, how many turns does the secondary one have?​

Answer 1

The applicable relationship is N1/N2 = V1/V2, meaning the ratio of primary voltage to secondary voltage is equal to the ratio of primary turns to secondary turns.

Here N1 = 1000, V1 = 250, V2 = 400V and N2 = TBD.

Rewriting the above relationship, N2 = N1 V2/V1 = 1000 x 400/250 = 1600 turns.