when a current is passed through a coil of wire with a piece of iron inside (an electromagnet,a commutator) is formed?
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Your welcome :)
any other questions?
ummm : coil is rotated by an outside source of ______ energy.
That is mechanical energy
okay i was thinking it was electrical energy for some reason. And thanks again !!!
Coil is rotated by an outside source of mechanical energy
Examples: Steam, wind, water
As the coil turns in the magnetic field, electric current flows through the wire
When the coil turns so that the ends move past opposite ends of the magnet:
The current reverses direction
The current changes direction twice with each revolution
A generator that is used in a car is known as an alternator
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