# How many turns are in the secondary winding of the transformer, if there are 20 turns in the primary

July 28, 2021 | education

| **How many turns are in the secondary winding of the transformer, if there are 20 turns in the primary, and the transformer changes the voltage from 200V to 1000V?**

Initial data: N1 (number of turns in the primary winding of the transformer) = 20 turns; U1 (voltage value at the ends of the primary winding) = 200 V; U2 (voltage value at the ends of the secondary winding) = 1000 V.

The number of turns in the secondary winding can be found from the ratio: U1 / U2 = N1 / N2, whence N2 = U2 * N1 / U1.

Let’s do the calculation:

N2 = 1000 * 20/200 = 100 turns.

Answer: There are 100 turns in the secondary winding of the transformer.

One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.