and
are arranged as shown in
Fig. 3(EP).1. The one carrying current is
along the x-axis. The other carrying current is
along a line parallel to the y-axis given by x = 0 and z = d.
Find the force exerted at
because
of the wire along the x-axis.
Answer:
Magnetic field at point 
due to current 
in long wire along x-axis
is
; It will be acting along
the y-axis. As second wire is along y-axis, so the angle between the directions
of 
and 
is zero, i.e., 
= 0°.
Force
on wire lying along y-axis is, 
.
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