Transformers Definition and 254 Threads

Let's say that there is a transformer with 10 loops on one side (side A) and 100 loops on the other (side B). If ther is a rms 10V potential difference produce by a generator on side A, then there would be a rms 100V potential difference on side B. It would seem like the resistance through the...

A transmission line that has a resistance per unit length of 4.5*10^-4 ohms/m is to be used to transmit 5 MW over 400 miles (6.44*10^5 m). The output voltage of the generator is 4.5 kV. a) What is the line loss if a transformer is used to step up the voltage to 500 kV? b) What fraction of the...

I was just wondering how transformers actually operates. And I hear they need to use alternating current and I was just wondering why they need to do so.

Im a high school student/newbie at this stuff. In physics class we just started going over the electric grid. My teach first talked about how transformers are used to get high voltages for long distance travel. If I understood him, he said transformers boost the voltage while droping the...