Let's have a look at period while DC current is increasing (turning on DC power supply). The effect of that is increasing magnetic field. In this period the field is not constant, but increasing. In the ring will be induced increasing current in such direction to oppose the increasing field. For...
Thanks for a replay, that's clear now, I have understand.
There is one more thing about electromagnetic forces between the ring and the coil. Let's say that I have DC power supply for a coil. When i turn on power supply i'll have increasing magnetic filed which will induce current in the ring...
Hi,
can someone explain me the next experiment:
If I have an AC coil on iron stick, and if I put Cu ring on that stick concentric with AC coil, when I turn coil power supply, the ring will levitate on some height. My question is:
Powered AC coil produces an AC magnetic field. If I put a...