The magnet should be at rest because the dc does not make an moving electromagnet
2006-08-29 20:59:34 · 6 answers · asked by RGs 1 in Science & Mathematics ➔ Physics
so there is nothing moving from one pole to the other
2006-08-30 00:59:04 · update #1
Ahhh, I had the same confusion when I studied physics. A direct electric current alone, does not make a magnet... The current needs to be coiled, and the magnetic field appears in the middle of the coils, Created by a change in magnetic flux from one end to the other. So... In order to reverse the process we need to create a change in magnetic flux across a wire to create a current. We can do this lots of ways, one of which is by moving a magnet through a loop... another way is to take a stationary magnet, with adjustable strength, and change the strength of the magnet back and forth. This change in flux will create a current in the surrounding coil.
2006-08-29 21:05:21 · answer #1 · answered by Have_ass 3 · 0⤊ 0⤋
There is a magnetic field around a straight wire with direct current moving through it. The magnetic field forms a cylinder around the wire with the wire at the center.
A magnet will induce a current in a conductor as long as the magnet is moving or the wire is moving through the magnetic field.
2006-08-29 21:10:56 · answer #2 · answered by z_o_r_r_o 6 · 0⤊ 0⤋
Maxwell's equations show the relationships between electric and magnetic fields and electric charges. A magnetic field is created by a moving charge. An electric field is created by a changing magnetic field. The electric field causes electrons (charges) to flow in the conductor.
2006-08-29 22:49:45 · answer #3 · answered by Frank N 7 · 0⤊ 0⤋
Who said it doesnt? How do you think a generator works? A permanent magnet is rotated next to a coil of wire! Creating magnetism with direct current its exactly the same! The dc either needs to be pulsated to create the magnetic field or the coil needs to be moved back and forth.
2006-08-29 21:06:46 · answer #4 · answered by Anonymous · 1⤊ 0⤋
you could concievably save the cost of a lightning bolt on a capacitor as a available distinction. even with the undeniable fact that, you'll desire an extremely bloody vast capacitor. A conductor placed into the nationwide grid would do not something. Its a large sufficient value to arc to earth... the vast worry is the lightning bolt has an excellent number of power in an extremely little while.. I.e. there is not any way of storing it.. because of this the capacitor will be used yet in ordinary words theoretically.
2016-12-05 23:03:58 · answer #5 · answered by ? 4 · 0⤊ 0⤋
if the magnet and conductor have 'relative motion' current will be induced
(lines of flux must be 'cut')
2006-08-29 21:05:50 · answer #6 · answered by atheistforthebirthofjesus 6 · 0⤊ 0⤋