Two long parallel conductors carry currents in the same direction as in the figu

Question

Two long parallel conductors carry currents in the same direction as in the figure. Conductor A carries a current of IA=165 A and is held firmly in position. Conductor B carries a current IB and is allowed to slide freely up and down (parallel to A) between a set of nonconducting guides.

The acceleration of gravity is 9.8 m/s2 and the permeability of free space is 1.25664 x 10-6 T*m/A.

If the mass per unit length of conductor B is 0.1404 g/m, what value of current IB will result in equilibrium when the distance between the two conductors is 2.7 cm?

Answer in units of A.

Explanation / Answer

1125.179 A

force per unit length = mg/l= u(permea)*I1*I2/2*pi*d

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