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Electromagnets allow for greater control over the magnetic field strength, so the motor can be more easily controlled. By adjusting the current flowing through the electromagnet, the motor's speed and output power can be varied. This makes electromagnets more versatile in applications where the motor needs to operate under different conditions.
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Why permanent magnets are needed for an electric motor?
Permanent magnets are needed in an electric motor to create a constant magnetic field that interacts with the current flowing through the motor windings, resulting in motion. The magnets help to generate torque and provide a more efficient and controlled operation of the motor compared to electromagnets. With permanent magnets, the motor requires less power input to produce the required output.
How can an electric motor be constructed without the use of magnets?
An electric motor can be constructed without the use of magnets by using electromagnets instead. Electromagnets are created by passing an electric current through a coil of wire, which generates a magnetic field. This magnetic field can then interact with other magnetic fields to produce motion in the motor.
Why are electromagnets useful in motors?
Electromagnets are sometimes more useful because they can be turned on and off at will. This feature allows them to do things that other permanent magnets cannot do. High speed mag-lev trains use this ability to their advantage to propel themselves down the rails.
What characteristic of magnets is important in making a motor turn?
The characteristic of magnets important in making a motor turn is the ability to create a magnetic field. In an electric motor, interactions between the magnetic fields of the permanent magnets and the electromagnets cause the motor to turn by generating a rotating magnetic field that drives the rotation of the motor's rotor.
What part of an electric motor repelse of the permanent magnets?
The stator of an electric motor repels the permanent magnets with the help of an alternating current passing through the windings of the stator. This creates a rotating magnetic field that interacts with the permanent magnets on the rotor, causing it to turn and drive the motor.
How are both permanent magnets and electromagnets used in a motor?
They both are strong and are made of iron and steel.
Why permanent magnets are needed for an electric motor?
Permanent magnets are needed in an electric motor to create a constant magnetic field that interacts with the current flowing through the motor windings, resulting in motion. The magnets help to generate torque and provide a more efficient and controlled operation of the motor compared to electromagnets. With permanent magnets, the motor requires less power input to produce the required output.
What is used instead of field coils in an electric motor?
permanent magnets
Does an electric egg beater contain magnets?
Yes, an electric egg beater will have some kind of magnets in it. These may be permanent magnets, or may be electromagnets, but the motor in the appliance will have to have some kind of magnets in it to operate on electricity.
Is a refrigerator an example of a permanet magnet or magnetic material?
A refrigerator is not a magnet, however it does contain an electric motor, and within that motor are permanent magnets (as well as electromagnets).
How can an electric motor be constructed without the use of magnets?
An electric motor can be constructed without the use of magnets by using electromagnets instead. Electromagnets are created by passing an electric current through a coil of wire, which generates a magnetic field. This magnetic field can then interact with other magnetic fields to produce motion in the motor.
Why are electromagnets useful in motors?
Electromagnets are sometimes more useful because they can be turned on and off at will. This feature allows them to do things that other permanent magnets cannot do. High speed mag-lev trains use this ability to their advantage to propel themselves down the rails.
What characteristic of magnets is important in making a motor turn?
The characteristic of magnets important in making a motor turn is the ability to create a magnetic field. In an electric motor, interactions between the magnetic fields of the permanent magnets and the electromagnets cause the motor to turn by generating a rotating magnetic field that drives the rotation of the motor's rotor.
Why electromagnets over permanent magnets for a large dc machine?
The flux density of an electromagnet can be easily controlled. It's also easy and cheap to produce a large flux density with an electromagnet which is necessary for such large dc motors. Permanent magnets are generally expensive. For such a large motor,a very large permanent magnet will be needed for that motor which will not be ideal.AnswerElectromagnets are more powerful than temporary magnets, and -as pointed out above- their flux density can be controlled.
Does a washing machine motor have permanent magnets?
no
What are the uses of magnets and electromagnets daily?
induction motor (in washer for example), compass, speaker
What part of an electric motor repelse of the permanent magnets?
The stator of an electric motor repels the permanent magnets with the help of an alternating current passing through the windings of the stator. This creates a rotating magnetic field that interacts with the permanent magnets on the rotor, causing it to turn and drive the motor.
