cse • paper_1 • electrodynamicscse-1989-subject-03-005
Magnetic field — UPSC CSE 1989 Physics PYQ
Buy PYQ Solution Manual →A wire of length l is bent into the form of a rectangle of side a and b and carries a current I. Calculate the magnetic field intensity at the centre of the rectangle. Show further that the intensity is minimum for a = b.
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