Have at it if you wish:
~If a car is made of iron and steel moves over a wide closed loop of wire embedded in a road surface, will the magnetic field of Earth in the loop be altered? Will this produce a curretn pulse?
~A model electric train requires a low voltage to operate. If the primary...
When a strip of magnetic material, variably magnetized, is embedded in a plastic card that is moved past a small coil of wire, what happens in the coil. What is a practical application of this?
I have no idea what this means, I don't understand Physics and my teacher doesn't help either. He...