Magnetic field strength effected by insulation of wire

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Discussion Overview

The discussion revolves around the impact of insulation on the magnetic field strength generated by conductors carrying current. Participants explore whether the presence of insulation affects the intensity of the magnetic field compared to bare conductors, examining theoretical implications and material properties.

Discussion Character

  • Debate/contested
  • Technical explanation

Main Points Raised

  • One participant questions whether the magnetic field strength around a bare conductor is greater than that around an insulated conductor.
  • Another participant asserts that insulation has no effect on the magnetic field strength.
  • A different viewpoint suggests that insulation materials with lower magnetic permeability than air could have a negligible effect on the magnetic field.
  • It is proposed that only ferrous materials would significantly affect the magnetic field, implying that neither air nor typical wire insulation is ferrous.
  • Some participants emphasize that the effect of insulation is negligible, referencing the use of shielded cables as evidence.

Areas of Agreement / Disagreement

Participants express differing opinions on the effect of insulation on magnetic field strength, with some arguing it is negligible while others suggest there may be minor effects based on material properties. No consensus is reached regarding the overall impact of insulation.

Contextual Notes

Participants mention the need for ferrous materials to significantly influence the magnetic field, indicating that assumptions about material properties and definitions of "effect" are relevant but not fully explored.

samieee
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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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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?
 
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?
 
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.
 
The effect of the insulation is negligible. That is why you have shielded cable.
 
MrAnchovy said:
The effect of the insulation is negligible. That is why you have shielded cable.

hmmm
 

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