Why the intensity of magnetic field lines increases on making circular loop?
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The strength of the field is proportional to the closeness (or density) of the lines. ... (a) The magnetic field of a circular current loop is similar to that of a bar magnet. (b) A long and straight wire creates a field with magnetic field lines forming circular loops.
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When wire is carrying current which runs through a straight wire, a circular magnetic field is generated around it. When a wire is made into a circle, the current generates a magnetic field parallel to its axis which increase the magnetic field strength.by piling the Coils on the top of each other
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