Hello.
The Magnetic Field lines are concentric circles for a Straight wire.Hence the points above and below point B should not contribute to the magnetic field at A.
So Why do we integrate the expression across the whole length of the wire to get magnetic field at point A?
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The Magnetic Field lines are concentric circles for a Straight wire.Hence the points above and below point B should not contribute to the magnetic field at A.
So Why do we integrate the expression across the whole length of the wire to get magnetic field at point A?
