A constant current flows in a horizontal wire | vedclass

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(A) According to the Right-Hand Thumb Rule,if you hold the current-carrying wire in your right hand such that your thumb points in the direction of th

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directly below the wire

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(A) According to the Right-Hand Thumb Rule,if you hold the current-carrying wire in your right hand such that your thumb points in the direction of the current (West),then your curled fingers represent the direction of the magnetic field lines.$1$. The current flows from East to West.$2$. Above the wire,the magnetic field lines point towards the North.$3$. Below the wire,the magnetic field lines point towards the South.Therefore,the direction of the magnetic field is from North to South directly below the wire.

$A$ constant current flows in a horizontal wire in the plane of the paper from east to west as shown in the figure. The direction of the magnetic field at a point will be North to South:

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