Electric motors and electric generators can have permanent magnets or electromagnets. It depends on the design. For example electric generators can be dynamos, alternators, or rotary converters. However, in General Electric motors are electromagnetic so that resistance disappears when current is cut and electric generators have permanent magnets.
My only guess is that ,,, because electromagnets are more stronger and powerful than the ordinary magnets. Moreover they provide continuous magnetic field required for the generator. the generator in your car will have an electromagnet in the field the field will set the charge rate new cars have an alternator the field is the electromagnet in the rotor older cars have a true generator where the field is in the stator
Mainly in that the electromagnet is NOT permanent. In other words, it can be switched on and off.Another relevant difference is that the electromagnet constantly requires power, at least while it is on.
A generator is a device that creates energy, or transforms it from one form into another. Here are some sentences.I bought a generator in case the electricity goes out.The generator in the dam was strong enough to power the whole city.That machine is a generator.
This is what makes a magnet an electromagnet - the ability to turn it on and off... Anyway, electromagnets can be turned off with either the help of a switch, or just by disconnecting the power supply.
the pedals drive the wheel, the wheel drive an electrical generator.2 possibilities for the wheel to drive the generator:-the wheel does not have a tire: a belt goes in the rim and drive a puley on the shaft of the generator.-the wheel has a tire: there is a drive roller on the shaft of the generator. the drive roller is pressed on the tire.The generator can be of any kind. They are commonly car alternator or permanent magnet dc motor, but you can also drive an alternative current squirel cage generator. Depending on the chosen generator, you have to use an electric circuit appropriate for the generator.
an electromagnet
an electromagnet
Both a generator and an electromagnet involve the use of coils of wire with an electric current flowing through them. In a generator, the motion of the coil creates an electric current, while in an electromagnet, the electric current produces a magnetic field.
in a generator electromagnets are used for producing flux for rotor to cut so it can produce current in small generator they will have residual magnetism and in big generator current is supplied to electromagnet from another small dc generator
I thinkit is different because a motor changes eletricalenergryinto motion a generator changesa motion into eletericalenergy.
dynamo
no
Its role is to change mechanical energy into electrical energy.
Every electric motor and generator uses an electromagnet.
Generator
The field winding on a generator is the winding that is electrified to create an electromagnet; it is generally the winding found on the rotor (the rotating part of the generator).
Its role is to change mechanical energy into electrical energy.