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P-2 please help me with the below problem with step by step explanation clearly.

Note: the fancy way to do this problem involves a line integral, but a brief, convincing argument in words will be good

11. (III) A curved wire, connecting two points a and b, lies in a
plane perpendicular to a uniform magnetic field B and
carries a current I. Show that the resultant magnetic force
on the wire, no matter what its
shape, is the same as that on a x
straight wire connecting the two
points carrying the same current I.
See Fig. 27-40.
curved
/
I straight
FIGURE 27-40
Problem 11.
ix x x

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