Fig. 2.
Notation used for the 2D magnetic field. (a) Magnetic field of the current sheet alone, where the values at the points O(0 + ,0) and 
are denoted by 
and 
, respectively. (b) Representation of the current sheet by a set of line currents, denoted by dots, in which the magnetic field at a point P is calculated due to a line current at Q at a distance z along the z-axis.
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