Question #187821

A transformer with 40 turns on the high voltage winding is used to step down the voltage from 240V to 120V. Find the number of turns in the low voltage winding.

Expert's answer

Using the expression for the transformation ratio

"k=\\frac{U_1}{U_2}=\\frac{N_1}{N_2}" Where "U_1=240V,U_2=120V,N_1=40"

write down

"N_2=\\frac{N_1 \\cdot U_2}{U_1}=\\frac{40 \\cdot 120}{240}=\\frac{40}{2}=20(turns )"

Learn more about our help with Assignments: Electrical Engineering

## Comments

## Leave a comment