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A. Determine the magnitude and direction of the force between two parallel wires 35m long and 5.0cm apart, each carrying 35A in the same direction.

B. Determine the magnitude of the force between two parallel wires.
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Added Thu, 06 Aug '15
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force between two parallel wires is given by F = u0i1i2L/2pid

where u0 = constnat = 4pi*10^-7 H/m,

i1, i2 are the currents ,

L s the length o the wire,

d is the distqance between these two wires

if current are in same directiion, there exists , they exert attractive force on each other

and if currents are in opposite direction, they exert repulsive force

so here we apply
-------------------------------------------------

F = 4pie-7 *35*35*35/(2pi*0.05)

F = 0.1715 N

Edit
Added Thu, 06 Aug '15
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