1.

The direction of the current and the magnetic field are both reversed then what would happen to the force?

Answer»

For the DC current (Direct current), when you change the direction of the current in an electromagnet, the North and South poles of the elec-magnet will be reversed.

With the AC current, it constantly (continuously) changes its current direction, hence the North and the South poles will change continuously, too. That is an application for the motor.



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