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What happens when a coil 2 is placed near a wire which has current moving uniformly?

by aditya23456
Tags: coil, current, moving, uniformly, wire
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aditya23456
#1
May9-12, 12:56 AM
P: 111
I guess it does not produce any field in 2nd coil because there's no change in current in coil right?So there won't be any emf ..
but coil 2 has magnetic field passing through it which results in current in coil(by forcing movement of electrons of coil 2 SINCE ELECTRONS ARE ALREADY IN MOTION INSIDE ATOMS)
So what finally happens?
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tiny-tim
#2
May9-12, 07:39 AM
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hi aditya23456!

do you mean a straight wire?

yes, the magnetic field will have the same effect as a stationary magnet it will align or precess the spins of the electrons, resulting in extremely weak para- or dia-magnetism, and no discernible effect, except if coil 2 is ferromagnetic

(i guess that's why electric wire isn't made of iron)
aditya23456
#3
May12-12, 09:39 AM
P: 111
but as per prinicple, current is induced in wire only if current changes right..but why cant current be induced when there's no change in current since just current flowing is now with our above principle :/
Hi btw :)

tiny-tim
#4
May12-12, 12:09 PM
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What happens when a coil 2 is placed near a wire which has current moving uniformly?

a stationary magnetic field can make a loop of current (like a spinning electron) rotate, but it can't make it move as a whole

the forces cancel out

the magnetic field from your wire won't make the electrons move, it will only affect their spins


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