A straight thick long wire of uniform cr...

A straight thick long wire of uniform cross-section of radius a is carrying a steady current I. Calculate the ratio of magnetic field at a point `a//2` above the surface of the wire to that at a point `a//2` below its surface. What is the maximum value of the field of this wire?

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A straight thick long wire of uniform cross-section of radius a is carrying a steady current I. Calculate the ratio of magnetic field at a point `a//2` above the surface of the wire to that at a point `a//2` below its surface. What is the maximum value of the field of this wire?

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