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What are the Advantages and disadvantages of permanent magnets?
Wiki User
∙ 12y ago
permanent magnets and wound stators (temporary magnets) can be used inthe generators and motors.
in small size generators (eg: dynamo in cycle),permanent magnets are used because,
1 it does not require electricity to magnetise
2 does not require stator cooling
but in larger size generators and motors, temporary magnets are prefered because,
1 it is small in size of same power permanent magnets
2 we can control the stator magnetic field by adjusting the power
3 the magnetic flux density per square cm is more
etc..
Wiki User
∙ 12y ago
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What are the advantages and disadvantages of electromagnetism?
an electromagnet requires electricity and you will have to pay for it. permanent magnets are always on and you can change the strength of it.
What are the advantages and disadvantage's of an electromagnet?
an electromagnet requires electricity and you will have to pay for it. permanent magnets are always on and you can change the strength of it.
What types of magnets are harder to magnetize but retain magnetism much longer?
permanent magnets
What is true of permanent magnets?
Permanent magnets contain a current-carrying wire.
Are permanent magnets only attracted to other permanent magnets?
No, they are attracted to: Other permanent magnets Solenoids Iron Wires with current running through them
Are electromagnetic magnets permanent?
No, electromagnets are not permanent.
How are permanent magnets bad?
Permanent magnets aren't bad. period. I do not know where you heard that but whatevs..
Where can I find permanent magnets?
Permanent magnets can be purchased from sites such as Magnet Sales and PML India. A permanent magnet is more resistant to factors that would demagnetise it than regular magnets.
What is the difference between a permanent and non permanent magnet?
Permanent magnets are bar magnets or horse shoe magnets which has magnetism at all times. But non permanent also known as temporary magnets are usually electromagnets which would have magnetism only when current flows through the coil that surrounds it.
What type of magnets are harder to magnets but retains magnetism much longer?
permanent magnets
A permanent magnet can affect?
A permanent magnet can affect magnets and electromagnets.
Why aren't permanent magnets really permanent?
They can be demagnetized. Because nothing can be permanent :-)
