- #1
michojek
- 25
- 0
Hi, I've been trying to understand electricity... and series of questions came into my mind..
1. I know if i move a conductor in an external magnetic field, it induces EMF, but
I don't really understand INDEPTH how CHANGE in MFlux induces EMF?
I think something to do with EF and MF...
2. Also with the conductor in an external magnetic field, since current is induced by voltage,
do electrons flow from one side of the rod to another? So is there current even if there's no 'circuit', furthermore does the rod become positively charged in one side and negative in the other?
3. As a motor spins, back emf is induced, to eventually result in NET VOLTAGE of zero
but how is there flow in current if there is no potential difference?
Also is there back EMF in AC motors?
Thanks =]
1. I know if i move a conductor in an external magnetic field, it induces EMF, but
I don't really understand INDEPTH how CHANGE in MFlux induces EMF?
I think something to do with EF and MF...
2. Also with the conductor in an external magnetic field, since current is induced by voltage,
do electrons flow from one side of the rod to another? So is there current even if there's no 'circuit', furthermore does the rod become positively charged in one side and negative in the other?
3. As a motor spins, back emf is induced, to eventually result in NET VOLTAGE of zero
but how is there flow in current if there is no potential difference?
Also is there back EMF in AC motors?
Thanks =]