Find out secondary current:
A transformer along with 480 turns on the primary and 60 turns on the secondary draws 0.6 amps from a 120 V line. Find out IS.
Solution:
NP / NS = IS/ IP
Next, we solve for IS.
IS = (NP / NS ) IP
IS = (480 / 60) 0.6 amps
IS = 4.8 amps
The student should remember from the last examples in which a transformer which "steps-up" voltage, "steps-down" the current proportionally.