direct current I flows in a straight filamentary conductor P1 P2.a) Prove that B at a poin...

direct current I flows in a straight filamentary conductor P1 P2.

a) Prove that B at a point P, whose location is specified by the perpendicular distance r and the two angles α1 and α2 shown in Fig 5-24 is

 (5-135).

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b) Verify that Eq. (5-135) reduces to Eq. (5-35) when the wire is infinitely long.