Fewpal
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A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti clockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole of the resultant magnet is on the face close to


(a) A 

(b) B
(c) A if the current is small, and B if the current is large
(d) B if the current is small and A if the current is large

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1 Answer

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by (256k points)

(a) Hint— Misconception is that magnetic field lines point from north to south pole. The fact is that they emerge out of North pole and entre into South pole.

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