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-   -   Magnetic field strength effected by insulation of wire (http://www.physicsforums.com/showthread.php?t=578655)

 samieee Feb17-12 12:01 PM

Magnetic field strength effected by insulation of wire

Hello,
Suppose there are two conductors carrying currents. One of them is bare conductor and the other has insulation. Now magnetic field will be created around them due to the current flow through them. What will be the condition of magnetic field strength around them? They have same field intensity or intensity around bare conductor will be greater than insulated conductor? Please explain

Thanks

 berkeman Feb17-12 12:40 PM

Re: Magnetic field strength effected by insulation of wire

Quote:
 Quote by samieee (Post 3769511) Hello, Suppose there are two conductors carrying currents. One of them is bare conductor and the other has insulation. Now magnetic field will be created around them due to the current flow through them. What will be the condition of magnetic field strength around them? They have same field intensity or intensity around bare conductor will be greater than insulated conductor? Please explain Thanks
The insulation has no effect. Why would it?

 samieee Feb17-12 12:48 PM

Re: Magnetic field strength effected by insulation of wire

Quote:
 Quote by berkeman (Post 3769578) The insulation has no effect. Why would it?
Thanks for your reply. I guess insulation materials having lesser magnetic permeability than air will bring some effect (though negligible) isn't it?

 berkeman Feb17-12 12:52 PM

Re: Magnetic field strength effected by insulation of wire

Quote:
 Quote by samieee (Post 3769584) Thanks for your reply. I guess insulation materials having lesser magnetic permeability than air will bring some effect (though negligible) isn't it?
A material would need to be ferrous to affect the magnetic field. Neither air nor wire insulation is ferrous.

 MrAnchovy Feb17-12 01:37 PM

Re: Magnetic field strength effected by insulation of wire

The effect of the insulation is negligible. That is why you have shielded cable.

 samieee Feb18-12 05:41 AM

Re: Magnetic field strength effected by insulation of wire

Quote:
 Quote by MrAnchovy (Post 3769658) The effect of the insulation is negligible. That is why you have shielded cable.
hmmm

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