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To find magnetic field due to current conducting straight wire we have Maxwell's Right hand thumb rule, Which says "Put your right hand thumb in the direction of current then curled fingers shows the direction of field" I can see that this can be used for a current conducting loop but there is another version for a loop.

To find magnetic field due to a current conducting loop is given by another right hand thumb rule. The rule says "curl your fingers of right hand along the direction of current then thumb gives the direction of field"

My question is that who gave the second rule. Is it given by Maxwell himself or someone else? Is it modified version of first stated rule? Who should I credit for the second rule?

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Right-hand rule was invented for use in electromagnetism by British physicist John Ambrose Fleming in the late 19th century.

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  • $\begingroup$ But my question is that who gave alternative form of Maxwell's Right hand rule for current and magnetic field only? $\endgroup$
    – Level1
    Dec 23, 2022 at 10:34
  • $\begingroup$ Maxwell gave the rule for B and I only. While Fleming gave the rule for FBI. $\endgroup$
    – Level1
    Dec 23, 2022 at 10:36

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