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7. The figure shows a cross section of three parallel wires each carrying a current of 15 A. The currents in wires A and B ar

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Answer #1

force on A

F = force due to B - force due to C

F = (uo/ 4pi) 2 i^2* L ( 1/ rab - 1/rac)

F = 10^-7* 2* 15^2*4*( 1 /5 - 1 / 7.5)* 10^3

F = 0.012 N

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