A current passes through a wire from south to north. The direction of the magnetic field at a point vertically above the wire will be from
_to __

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Solution

west to east
(from Ampere's swimming rule:states that if a man swims along the wire carrying current such that his face is always towards the magnetic needle with current entering his feet and leaving his head then the North Pole of the magnetic needle is always deflected towards his left hand.

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Question 9
A constant current flows in a horizontal wire in the plane of the paper from east to west as shown in figure. The direction of magnetic field at a point will be north to south

(a) directly above the wire
(b) directly below the wire
(c) at a point located in the plane of the paper, on the north side of the wire
(d) at a point located in the plane of the paper, on the south side of the wire

A straight wire lying in a horizontal plane carries a current from north to south.

(a) What will be the direction of magnetic field at a point just underneath it?

(b) Name the law used to arrive at the answer in part (a).

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A current passes through a wire from south to north. The direction of the magnetic field at a point vertically above the wire will be from _______to ________

west to east (from Ampere's swimming rule:states that if a man swims along the wire carrying current such that his face is always towards the magnetic needle with current entering his feet and leaving his head then the North Pole of the magnetic needle is always deflected towards his left hand.

A current passes through a wire from south to north. The direction of the magnetic field at a point vertically above the wire will be from
_to __

west to east
(from Ampere's swimming rule:states that if a man swims along the wire carrying current such that his face is always towards the magnetic needle with current entering his feet and leaving his head then the North Pole of the magnetic needle is always deflected towards his left hand.