The Exciting World of Transformers

How does a step-up transformer work?

A step-up transformer is used on a 120 V line to provide a potential difference of 2400 V. If the number of turns in the primary is 75, what is the number of turns in the secondary winding?

Transformers play a crucial role in electricity distribution and transmission. A step-up transformer is designed to increase the voltage from the primary side to the secondary side. This type of transformer has more turns in the secondary winding compared to the primary winding.

When a step-up transformer is connected to a 120 V line and provides a potential difference of 2400 V, the number of turns in the primary winding is 75. By applying the transformer turns ratio formula, we can determine the number of turns in the secondary winding.

Utilizing the formula Np/Ns = Vp/Vs, where Np is the number of turns in the primary winding, Ns is the number of turns in the secondary winding, Vp is the primary voltage, and Vs is the secondary voltage, we substitute the given values:

75/Ns = 120/2400

By solving for Ns, we get:

Ns = (75 x 2400) / 120 = 1500

Thus, the number of turns in the secondary winding of the step-up transformer is 1500. This shows how a step-up transformer works by increasing the voltage output through the manipulation of turns in the winding.