Find an expression for the magnetic field induction at the centre of the coil bent in the form of a square of side 2a and carrying current I.
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The distance between the coil and the center is 2a/2 = a. This is the perpendicular distance between any side and the center O. The magnetic field strength/intensity B due to a finite conductor carrying a current of I, and of length L at a point at a distance d is : Here α and β are the angles OAB and OBA.
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