Can we coil it with a copper wire and convert it into an electromagnet??
2006-12-26 02:15:25 · 11 answers · asked by Ish 2 in Science & Mathematics ➔ Physics
around the magnet put a coil and pass electricity
2006-12-26 04:18:48 · answer #1 · answered by ram kumar 2 · 0⤊ 0⤋
Yes you can. Infact depending how you power the electromagnet you would either AID OR OPPOSE the permanent magnet. The electromagnet will still generate a filed that will expand and collapse with the power. However the permanent magnets field will either be added or subtracted based upon pole alignments so you will end up with some total or net magnetic force.
Q: So why would you do this??
A: By using opposing fields you can breifly switch off the NET magnetic attraction. So this would use less energy than just a pure electromagnet that would need to be energized continuously to create a magnetic field yet have the ability to be come non magnetic. ( I guess you could try this approach on a junk yard crane or small scale device that needs to drop or clear what ever material it collects)
If you power the coils with AC you will demagnetize the permanent magnet. So in the above example constantly opposing the permanent magets field will eventualy demagnetize it over time. This effect could be minimized or reduced if the coil polarity is breifly reversed so as to aid the field and realign magnetic domains scrambled by the opposing field.
2006-12-26 02:43:05 · answer #2 · answered by MarkG 7 · 0⤊ 0⤋
You would create opposing fields, and/or shunt the starting magnet. Better that you simply follow the laws: coil a wire and run voltage through it - that makes an electromagnet aka inductive loop. The smaller the coil/greater the voltage - the stronger the magnet.
2006-12-26 23:43:20 · answer #3 · answered by ericscribener 7 · 0⤊ 0⤋
When the current is turned off on an electromagnet the magnetic field must collapse.
A strong permanent magnet would retain its magnetism and would not collapse when the coil was turned off.
2006-12-26 02:22:52 · answer #4 · answered by Billy Butthead 7 · 0⤊ 1⤋
no..no magnet cannot be converted.. what is meant by electromagnet--- when the coil is wound around the steel or iron bar magnetic field is produced k... magnet cannot be converted,, only iron bar can be converted
2006-12-26 21:37:29 · answer #5 · answered by chandra sekaran.p 2 · 0⤊ 0⤋
Only if the coil is wound or the current direction is such that it aids the field of the magnet above a critical field/flux intensity so the whole magnet assembly can attract ferous metals from a distance.
2015-03-08 09:01:00 · answer #6 · answered by Robert 4 · 0⤊ 0⤋
I thought the whole point of an electromagnet was that the magnetism could be "switched on and off" (by switching the electricity on and off)
Once magnetised, a strong magnet will remain magnetised, so you cannot switch it off.
2006-12-26 02:20:50 · answer #7 · answered by rosie recipe 7 · 2⤊ 1⤋
yes you have to coil it correct and direction of current should be according to the mgnetic field.
2006-12-26 04:01:24 · answer #8 · answered by piyush v 2 · 0⤊ 0⤋
no point - in fact the magnetic field that it has would interfere with the electro-magnetic field you would generate
all you need to do is make one - try the articles in Wikipedia or How Things Work
2006-12-26 02:19:18 · answer #9 · answered by Anonymous · 2⤊ 1⤋
yeah, coil correctway, put electric charge in wire, and there you go, one electomaget.
2006-12-26 02:28:11 · answer #10 · answered by lasersail116480 2 · 0⤊ 0⤋