If a transformer has a primary voltage of 115v and a secondary voltage of 24v, with the number of turns in the primary is 345 how many turns are in the secondary?

Answer by  cveeras123 (32)

The ratio of number of turns to voltage remains same for both primary and secondary coils. For primary coil, this ratio is 345/115=3; So, turns in secondary =3X24=72 turns.

Answer by  SubhashChander (1773)

Primary turns = 345, Let secondary turns = Ns Primary Voltage = 115 Secondary Voltage = 24 As per transformation ratio and emf equation of transformer (Secondary Volatge/Primary voltage) = (Secondary turns/Primary turns) so it become 24/115 = Ns/345, Using cross multiplication 24 * 345 / 115 = 72 turns of secondary