Magnetic field strength effected by insulation of wire

In summary, two conductors carrying currents, one bare and one insulated, will create a magnetic field around them. The insulation on the conductor will have no effect on the strength of the magnetic field as it is not a ferrous material. The effect of insulation is negligible and shielded cable is used to minimize this effect.
  • #1
samieee
67
0
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
 
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  • #2
samieee said:
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?
 
  • #3
berkeman said:
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?
 
  • #4
samieee said:
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.
 
  • #5
The effect of the insulation is negligible. That is why you have shielded cable.
 
  • #6
MrAnchovy said:
The effect of the insulation is negligible. That is why you have shielded cable.

hmmm
 

1. How does insulation affect the strength of a magnetic field in a wire?

The insulation of a wire does not have a significant effect on the strength of the magnetic field. The magnetic field is primarily determined by the current flowing through the wire and the number of turns in the wire, rather than the insulation material.

2. Can different types of insulation impact the magnetic field strength in a wire?

As mentioned before, the type of insulation material used does not significantly affect the magnetic field strength. However, some insulating materials may have a higher resistivity, which can slightly decrease the current and therefore the magnetic field strength. This effect is usually negligible.

3. Is there a specific thickness of insulation that is best for maximizing the magnetic field strength?

The thickness of the insulation does not have a direct impact on the magnetic field strength. However, thicker insulation may lead to a slightly higher resistance, which in turn can decrease the current and magnetic field strength. Therefore, it is best to use the appropriate thickness of insulation recommended for the wire's current rating.

4. Can damaged insulation affect the magnetic field strength in a wire?

If the insulation is damaged and exposes the wire, it can cause short circuits or arcing, which can disrupt the flow of current and decrease the magnetic field strength. It is essential to regularly check and replace damaged insulation to maintain the wire's electrical and magnetic properties.

5. Is it possible to increase the magnetic field strength by adding more insulation to a wire?

No, adding more insulation to a wire will not increase the magnetic field strength. As mentioned previously, the magnetic field is primarily determined by the current and the number of turns in the wire, not the insulation material or thickness. Adding more insulation will only increase the wire's resistance and potentially decrease the current and magnetic field strength.

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