The number of turns in the primary winding of the transformer is 200, and in the secondary – 50.

The number of turns in the primary winding of the transformer is 200, and in the secondary – 50. The alternating current voltage at the primary winding is 160 V. Determine the voltage at the secondary winding.

First, we need to determine the transformation ratio k = n1 / n2, where n1 is the number of turns in the primary winding, and n2, respectively, in the secondary.
k = 200/50 = 4, step-down transformer.
So U2 = U1 / k, where U2 is the voltage on the secondary winding, and U1 is
AC voltage on the primary winding, which means U2 = 160/4 = 40 V.
Answer: 40 V.