Hi,(adsbygoogle = window.adsbygoogle || []).push({});

Can somebody answer this question?

The induced magnetic field of the secondary coil opposes the magnetic field of the primary. Therefore there is a lower magnetic field on the primary - lower impedance and a lower voltage drop. This results in an increased primary current which will in turn increase the primary bemf and therefore the primary voltage will rise and so goes the cycle.

In the article I have read it says the increased primary current results in a larger power draw. I am wondering how can this be when at the same time the primary current is increasing the primary voltage is decreasing. It seems to me the power draw would be constant.

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Ideal Transformers and Lenz Law

**Physics Forums | Science Articles, Homework Help, Discussion**