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What is the key advantage of an electromagnet over a conventional magnet?
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What is an advantage of using an electromagnet over a permanent magnet?
The advantage of an elecromagnet is that you can turn it on and off with a simple switch. So for example if you want to pick up a scrap car with a crane/electromagnet and move it, you can turn the electromagnet off when you want to release the car. You could not do the with a permanent magnet obviously.
How can you magnetize an object?
If the material can be magnetized e.g Iron, cobalt etc. then you take a magnet and stroke your material over and over again in the same direction until magnetized or you can expose it to a strong magnetic field (often an electromagnet), then it will magnetize the object. The force required to magnetize an object is usually greater than can be achieved solely with a magnet made from a similar material.
Can you laminate over a magnet?
wont hurt the laminate, might insulate the magnet..
Why permanent magnet is not used to lift heavy load?
But they are! You can find lifting magnets based on permanent magnets all over in machine shops.
How a compass can be used to trace the magnetic field of the magnet?
The pull of the magnet will over ride the earths magnetism. So the compass will react to the magnet as it passes through its field.
What advantage does a electromagnet have over a bar magnet?
The electromagnet can be turned on and off depending on whether it's needed or not.
What is an advantage of using an electromagnet over a permanent magnet?
The advantage of an elecromagnet is that you can turn it on and off with a simple switch. So for example if you want to pick up a scrap car with a crane/electromagnet and move it, you can turn the electromagnet off when you want to release the car. You could not do the with a permanent magnet obviously.
What are two advantages of a natural magnet over electromagnet?
A natural magnet is permanent - an electromagnet loses its power when it's switched off.
What are two advantages of a electro magnet over natural magnet?
A permanent magnet is always on; there isn't any way to turn it off. An electromagnet can be controlled; you can turn it on or off, or change the amount of magnetism by varying the current passing through the coils.
A primary advantage of the electronic ignition system over conventional ignition systems is?
a primary advantage of the electronic ignition system over conventional ignition system is?
How can someone make an electromagnet stronger?
You have to take it out on a nice date first. Second, you have to pleasure the magnet for exactly 42 minutes. Third, you rub tons of ranch dressing all over the magnet on each side and keep it on there for 3-4 hours. These are the steps to make your electromagnet stronger.
What are the advantages of Permanent magnet over Electromagnet?
Unlike a permanent magnet, an electromagnet can be turned on and off. One useful advantage of this: Place a metal bar inside the electromagnet, apply current through the electromagnet in one direction, and the magnetic field would move that bar one way -- reverse the current reverses the magnetic field and the bar would move the opposite way. You could use that effect and make an electronically controlled lock for a door.
What is the advantage of using the bridge rectifier over the conventional full wave circuit?
Output voltage is higher!!!
What is a simple reason to how motors work?
If you take two magnets, you will notice that one end attracts one end of the other magnet and repels the other end. The opposite happens if you flip the other magnet over. It is possible to make an electromagnet by winding wire around a piece of metal. If you attach the wire to a battery it will attract one end of the magnet. If you attach the wire to the other end of the battery, it will attract the other end of the magnet.Also, with electricity, you can use a switch to change which end of the battery will go through which end of the wire. When the magnet comes close to the electromagnet, the motor throws a switch and suddenly the electromagnet repels the magnet. Part of the switch can be attached to the magnet. So motors work because electromagnets can both attract and repel.
Is a electro magnet stronger than a normal magnet?
it depends on how strong the electromagnet is. you basically choose how powerful to make an electromagnet when your designing one. one used for picking up cars at a junk yard is gonna be more powerful than one used in a kitchen appliance. and "normal magnet's" is not a good term for all other types of magnets. there are lots of different types of materials that can be magnetized, all of them are stronger or weaker then the others, all of them can also be made to different strengths, and all of them lose strength over time. the usefulness of an electromagnet is that they can be turned on and off depending on whether or not they have electricity running through them. http://en.wikipedia.org/wiki/Magnet
Why is an electromagnet better that a bar magnet?
Electromagnets can have higher "domain currents" than permanent magnets, and have no non-aligned nor anti-aligned domains like permanent magnets tend to have (or get over time).
How Electric Motors Work?
Many people are not aware of the fact that electric motors exist all around them. They are used in their car, washing machine, food processor, and so on. Even fewer people are aware of the way in which an electric motor actually works. Here are some of the basics. An electric motor is powered by the forces of electricity and magnetism. Magnets are used in order to create motion. Consider a simple magnet, with a north and south pole. The fact that a pole is attracted by its opposite and repulsed by the same is utilized in order to create the motion inside of an electric motor. The heart of the electric motor is the rotor, which is an electromagnet. An electromagnet consists of copper wiring that has been wound in a circle. When electricity moves in a circle, it creates a magnetic field. When electricity moves through the coil of wire, it becomes a magnet. When electricity is not passing through it, it is simply a coil of copper wiring. Inside an electric motor, there is at least one permanent magnet. When the electromagnet is activated, the north pole of the permanent magnet faces the north pole of the electromagnet. The permanent magnet is attached to an arm that can rotate around the electromagnet. Since the permanent magnet is repulsed by the north end of the electromagnet, it swings around to the other side. The direction of the electricity through the electromagnet is then reversed. This causes the north end of the electromagnet to become the south end. When this happens, the permanent magnet against swings over to the other side. This is the basic principle behind how all electric motors work. There are two basic types of electric motors: those that run on alternating current and those that run on direct current. A motor that runs on alternating current can take advantage of the fact that the direction of the electricity is constantly reversing in order to constantly reverse the polarity of the electromagnet and keep the electric motor running. In the case of direct current, a device known as a commutator is used in order to switch the direction of the current back and forth.
