The voltage across the secondary winding is 10,000 V, and the voltage across the primary winding is 25,000 V. lf the primary winding has 200 coils, how many coils are in the secondary winding?

2 Answers
Jun 2, 2017

The number of coils is =80 coils

Explanation:

The equation for a transformer is

V_s/V_p=n_s/n_p

The secondary voltage is V_s=10000V

The primary voltage is V_p=25000V

This is a step-down transformer.

The number of coils in the primary windings n_p=200

The number of coils in the secondary windings is

n_s=V_s/V_p*n_p

=10000/25000*200=80 coils

Jun 2, 2017

80 turns

Explanation:

(V_s)/(V_p) = N_s/N_p
where:
V_s = Voltage of secondary coil
V_p = Voltage of primary coil
N_s = Turns at secondary coil
N_p = Turns at primary coil

Therefore:
10000/25000 = N_s/200
N_s = 80 turns of wire