Left Hand Rule for a Straight Conductor

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SUMMARY

The discussion focuses on the application of the Left Hand Rule and Right Hand Rule for understanding magnetic fields around straight conductors and helices. The Right-Hand Rule is emphasized as the standard method for determining the direction of the magnetic field, where the thumb represents the direction of the current (I) and the fingers indicate the magnetic field's orientation. Additionally, it is noted that at the center of a helix, only the axial components of the magnetic field contribute significantly, while the external magnetic field is weak due to its dispersion over a large area.

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  • Understanding of electromagnetic principles
  • Familiarity with the Right-Hand Rule and Left Hand Rule
  • Knowledge of magnetic field concepts
  • Basic comprehension of helices in physics
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I was wondering if someone could give me a link to a site that will discuss the left hand and right hand rule for a straight conductor and a helix.
 
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Right-Hand Rules have become the de-facto standard.
We pretend that positive charge flows in the direction of the Indicated Current I . Thumb points along this Indicated Current, fingers wrap around the wire (as if to grasp the wire) as the Magnetic Field encircles the Current.

Do this for each part of the loops in a helix (bottom and top ; right and left)
at the center of the helix (on axis),
only the axial component of the magnetic field contributions add up.
The opposite magnetic field is outside the helix, very weak because it is spread out over a cross-section area with radius almost as big as L .
 

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