When the direction of current changes in electric motor after every half rotation, the electrons have to stop themselves and have to move in another direction. Due to this, a large amount of heat is produced in electric motor. Is this correct?
If not then why??
(Person with best explanation will be marked as brainliest)
Answers
Alternating Current (ac) is the type of electricity that we get from plugs in the wall. In an alternating current all of the electric charges switch their direction of flow back and forth.
How is an alternating current produced ?
An alternating current is produced by an electric generator. An electric generator consists of a magnet and a loop of wire which rotates in the magnetic field of the magnet. As the wire rotates in the magnetic field, the changing strength of the magnetic field through the wire produces a force which drives the electric charges around the wire. The force initially generates an electric current in one direction along the wire. Then as the loop rotates through 180 degrees the force reverses to give an electric current in the opposite direction along the wire. Every time the loop rotates through 180 degrees the direction of the force and therefore the current changes. The changing direction of the force after every 180 degrees of rotation gives the alternating current. As well as having the magnet and wire an electric generator also has slip rings which make sure that the ends of the wire are always connected to the same side of the electric circuit. This makes sure that the direction of the current changes every half revolution of the wire