The picture is correct, but it is 3.5 cm instead of 3.8 cm. Determine the magnit

Question

The picture is correct, but it is 3.5 cm instead of 3.8 cm. Determine the magnitude of magnetic force per unit length on wire M due to the other two. Determine the direction of magnetic force per unit length on wire M due to the other two. Determine the magnitude of magnetic force per unit length on wire N due to the other two. Determine the direction of magnetic force per unit length on wire N due to the other two. Determine the magnitude of magnetic force per unit length on wire P due to the other two. Determine the direction of magnetic force per unit length on wire P due to the other two. The picture is correct, but it is 3.5 cm instead of 3.8 cm. Determine the magnitude of magnetic force per unit length on wire M due to the other two. Determine the direction of magnetic force per unit length on wire M due to the other two. Determine the magnitude of magnetic force per unit length on wire N due to the other two. Determine the direction of magnetic force per unit length on wire N due to the other two. Determine the magnitude of magnetic force per unit length on wire P due to the other two. Determine the direction of magnetic force per unit length on wire P due to the other two.

Explanation / Answer

At A the mag of the other two wires is the same and
F/L =uo*I1*I2/2*pi*L = 2x10^-7*7.4^2/0.035 = 3.13x10^-4N

So F/L total = 2*3.13x10^-4*cos(30) = 5.42x10^-4N

Direction 90o


AT B Same magnitude as A = 5.42x10^-4T

but direction is 300 degrees

or  

60 degrees below the line toward C


At C Magnitude is the same = 4.99x10^-4N

Direction 240 degrees

or

60 degrees below the line toward B

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