is a
fixed angle made by PQ travelling smoothly over two conducting parallel wires separated
by a distance d.
Answer:
In Fig. 4(EP).9, PQ is a
wire of negligible resistance travelling smoothly over two conducting parallel wires
X and Y separated by distance (d). 
is
fixed angle made by PQ and B is strength of magnetic field perpendicular to the
plane of paper and outwards. Motional electric field = 
Its direction is along 0 K, perpendicular to 
and 
.
e.m.f. induced in wire PQ
current
in the wire, 
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