please help me in solving this problem!!
please help me in solving this problem!! Example 3 (i) A straight thick long wire of uniform cross-
section of radius 'a' is carrying a steady current I. use
Ampere's circuital law to obtain a relation showing the
variation of the magnetic field (Br) inside and outside the
wire with distunce r, (r u) und (r > a) of the field point from
the centre of its cross-section. Plot a graph showing the
variation of field B with distance r.
(ii) 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 ?
[NCERT ; CBSE D 10 ; OD 160
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