Field due to straight wire carrying current (Outside) | Moving charges & magnetism | Khan Academy

Let's find the expression for the magnetic field outside a straight long wire carrying current. Since the magnetic field is symmetric around the conductor, we can use Ampere's circuital law.

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Created by Mahesh Shenoy

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[niranjan]

Sir at 02:48

Please clarify this sir

[kaabdulrahman]

I have doubt that B is total magnetic field of total loop or B is magnetic field in particular point

[gargirahane]

Is there a video where B is calculated by biot savart law?