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Why are the field lines of a electromagnet the same as the field lines of a bar magnet?
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∙ 13y ago
i have done my Bcom from Naba Bharat shikha parishad orissa in year 2007.
my enrolment no:- C-2741/04, Roll no:- MS012078, i had given my exam from distance university Vashi centre through consultancy actually i want know that this certificate is valid or not, because its creates lots of problem in future. so please confirm me this exam which i given is valid or not.
Wiki User
∙ 13y ago
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Magnet field lines curve out from one pole and return to the same pole True or false?
False.
When you make a homemade electromagnet with wire and a nail and a battery does stripping the wire that is coiled around the nail make the electromagnet stronger?
No, this will stop the magnet from functioning and is the same as using a short thick wire instead of a long coiled wire.
What side is a magnet stronger?
The two sides of a magnet are called the north and south poles. Typically, the magnet is stronger at its poles rather than its sides. The strength of a magnet is usually concentrated at the poles, where the magnetic field lines are closer together and more forceful.
Why are magnet used in speaker loudspeaker?
the current flows to the voice coil, and at first the polarity of the current is the same as that of the speaker magnet, causing the voice coil to be pushed away from the magnet pushing the cone outward. then as the current cycles through it becomes opposite from the magnet cauing the voicecoil and cone to be pulled back in
Why magnetic strength is high at poles?
The answer is complicated. The simple answer is because the electron spin is aligned in the same direction. In most objects electron spin is random. In magnets most electrons are aligned with each other, creating a magnetic field. This orchestrated movement causes the field to be strongest at the poles.
Is there a magnet in an electromagnet?
An electromagnet is a type of magnet in which the magnetic field is produced by the flow of electric current. The magnetic field disappears when the current ceases. Take a look at this Wikipedia page for more information: http://en.wikipedia.org/wiki/Electromagnet
What is the similarities between a bar magnet and a electromagnets?
Both are magnets, but an electromagnet needs electricity to become a magnet. Hence, a magnet is also the same as a electromagnet.Also a magnet Will attract ferrous metals as will an electromagnet, when switched on!
Are electromagnets the same thing as magnets?
Yes. (Note: electromagnet and magnet) The only difference is that an electromagnet is when get a hunk of metal and flow electricity through it getting an electrically produced magnetic field and a normal magnet is a rock (magnetite) that comes with this magnetic field. So, yes. They are just made differently.
If an electromagnet were used instead of a bar magnet to pick up nails the electromagnet would do what?
It will pick up the nails the same way a bar magnet would do!
What is the same between a magnet and an electromagnet?
They both attrack metal and they have iron in them
Magnet field lines curve out from one pole and return to the same pole True or false?
False.
How do motors that do NOT use magnets work?
Motors that do not have magnets work exactly the same. The permanent magnet is replaced by a electromagnet, which is a coil of wire with a voltage applied to it. This electromagnet is what produces the magnet field necessary for a motor to operate. It is just easier and lighter to use this style of DC motor in larger applications.
Earth's magnetic field can make a magnet out of an iron bar by causing the magnetic domains to?
It lines up in the same direction :)
What is electromagnetic flux?
The electromagnetic force is a force that is expressed as (or that "shows up as") a "field" or a "group of lines of force" around the source. Electromagnetic flux is a direct reference to those magnetic lines of force. Electromagnetic flux is the electromagnetic field or the group of electromagnetic lines of force around the source. All the following sentences say the same thing: The electromagnetic flux around the magnet was very high. The magnetic flux around the magnet was very high. The magnetic field around the magnet was very large. The flux around the magnet was very high. The field around the magnet was very large. There were a large number of magnetic lines of force around the magnet making the field strength very high.
How can you turn off an electromagnet?
An electromagnet requires electric power to be a magnet. You turn it off the same way you turn off a light, by turning the switch.
Is the magnetic field of an electromagnet different to a bar magnet?
The magnetic domains in a refrigerator magnet are laid down in parallel strips. They are also re-curved back on themselves so that the back side of the magnet has both north and south poles. If you put two refrigerator magnets back-to-back and move them around a little, it won't take long for you to "feel" the strips of magnetism. The common bar magnet have two simple poles at the ends.
What ways can you magnetise an object?
The easiest is to align the object with the earth's magnetic field and pound on it with a hammer, but this is slow. Another is to rub one pole of a magnet repeatedly in the same direction along it. The fastest is to place it inside an electromagnet solenoid and power the electromagnet from a DC power source.
