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sometimes in magnetic sepration etc electromagnets are more useful than permanent one as first magnet is used to seprate metallic waste and then its turned off so that attracted waste falls off at desired place so here permanent magnets are not that use full as electromagnet as in permanent magnet waste would get attracted but it would not fall.
so electromagnet is more useful than permanent one.
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∙ 11y ago
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What is a true statement about the magnetic field between two magnets?
The south pole of one magnet is attracted to the north pole of the other magnet.
Why is an electromagnet more useful than a magnet?
AnswerWithout electromagnets, we won't have electricity to power up your home and your computer!! they help us in scrapyards because if we use permantmagnets we wont be able to turn of the magnetism
What type of magnets are there?
The main types of magnets areBar MagnetHorseshoe MagnetCylindrical MagnetBall-ended MagnetThese are the main types . There are many more types .
What are electromagnets and what are they used for?
It is a steel core with many wraps of fine wire around it. When a DC voltage is applied to each end of the wire to form a circuit the steel core becomes magnetized On application of the voltage, one end of the steel become the north pole and the other end of the steel becomes the south. Reverse the polarity of the DC voltage and the north south poles of the steel also change from end to end.
Which one is not a homogeneous mixture A permanent press fabric B Glue C Vinegar D Gelatin?
a permanent press fabric
What is one advantage of using electromagnets instead of permanent magnets?
Electromagnets can be turned off and off
Electromagnets are generally weaker than permanent magnets?
Depends on the size. One good example of a powerful electromagnet is the one used to lift cars at junk yards. Permanent magnets are not used for that due to the sheer power needed to lift cars. Also, electromagnets can be turned ON and OFF making them useful in picking up and then dropping the junk cars as needed. Another big example of electromagnets are the ones used on power generators to generate electric power.
Advantages and disadvantages of electromagnets?
There are many reasons why electromagnets shouldn't be used. For example, permanent magnets are better to use economically because there is no cost of operation, like an electromagnet. There is also no maintenance or hardly any setup required. For permanent magnets, they can be used for a lot longer than electromagnets becausecan be used in hazardous places and are they are unaffected by shock or vibrations. Electromagnets require electricity to run, which costs money. They also burnout or lose its magnetism after a while. There are also many reasons why electromagnets should be used. For an electromagnet, a person could easily control the power of the magnetism, unlike the permanent magnet which has the same intensity throughout. A person could also turn the power of the magnet on and off, which can become useful in certain situations. An electromagnet can also be made stronger than permanent magnets. The electromagnet also has a good field of depth, unlike the permanent magnets limited field depth.
What are the simalarities and difforences between an electro magnet and a permanent magnet?
Similar Each produces a magnetic field Each has a north and a south pole Different You can turn an electromagnet on and off. Permanent magnets are always "on". They are made from different materials Electromagnets require power. Permanent magnets don't. You can easily vary the strength of an electromagnet, but not a permanent magnet Some permanent magnets occur naturally and have been around for longer than humans have been. Electromagnets were not invented until the 1800's Electromagnets are capable of producing more intense magnetic fields than permanent magnets The names of some permanent magnets are more fun to say: neodymium-iron-boron Just thought I'd toss in that last one
Is an electromagnet stronger than a permanent magnet?
Not necessarily. The key difference between a permanent magnet and an electromagnet is the a permanent magnet does not change whereas an electromagnet's magnetic feild can be altered by varying the current through it. This means that electromagnets are more useful because they can be turned on or off, turned up or down or be put in 'reverse'.
How do you make a marker permanent?
You don't . Instead you go to the store and buy one .
Which one of Flemming's rules applies to electromagnets producing electricity?
which one of the flemmings rules applies to electromagnets producing electricity
How do you make a permanent marker pen?
You don't . Instead you go to the store and buy one .
What is a true statement about the magnetic field between two magnets?
The south pole of one magnet is attracted to the north pole of the other magnet.
What is use of magnets?
One major use of magnets is to determine the direction. The other major use is to generate electricity. All generators make use of of permanent or electromagnets to convert Mechanical energy into Electrical energy.
What is the use magnets?
One major use of magnets is to determine the direction. The other major use is to generate electricity. All generators make use of of permanent or electromagnets to convert Mechanical energy into Electrical energy.
What is one thing made out of neodymium?
Powerful electromagnets
