0
Why are the field lines of a electromagnet the same as the field lines of a bar magnet?
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.
What else can I help you with?
Magnet field lines curve out from one pole and return to the same pole True or false?
False.
Why magnetic field lines emerge perpendicularly from the surface of permanent magnet?
This is somewhat to similar to the ejection of electrons right perpendicular to the surface of cathode. This is due to repulsion between the like charged electrons. Same way magnetic lines of force never intersect and as they repel themselves they come out perpendicularly from the surface.
What type of magnet can only attract materials when it is touching another magnet?
A temporary magnet, such as an electromagnet, can only attract materials when in contact with another magnet or when an electric current is flowing through it. It loses its magnetism when the current is turned off or the magnetic field is removed.
Magnetic field lines curve out from one pole and return to the same pole true or false?
False. Magnetic field lines curve out from one pole, travel through the surrounding space, and then re-enter the magnet at the opposite pole.
Is it true or false that Magnetic field lines curve out from one pole and return to the same pole.?
False. Magnetic field lines emerge from the north pole of a magnet and curve around to enter the south pole, forming closed loops. They do not return to the same pole but rather connect the two poles, indicating the direction of the magnetic field.
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.
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.
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.
Why magnetic field lines emerge perpendicularly from the surface of permanent magnet?
This is somewhat to similar to the ejection of electrons right perpendicular to the surface of cathode. This is due to repulsion between the like charged electrons. Same way magnetic lines of force never intersect and as they repel themselves they come out perpendicularly from the surface.
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.
