finding the magnitude of current A 2.75 m segment of wire supplying current to t

Question

finding the magnitude of current

A 2.75 m segment of wire supplying current to the motor of a submerged submarine carries 1250 A and feels a 4.5 N repulsive force from a parallel wire 5.00 cm away. Randomized variables l = 2.75 m I = 1250 A F = 4.5 N What is the magnitude of the current in the other wire in A? I2 = A solenoid is producing a magnetic field of B = 9 times 10-3 T. It has N = 2000 turns uniformly over a length of d = 0.9 m. Randomized Variables B = 9 times 10-3 T N = 2000 turns d = 0.9 m Calculate the numerical value of I in Amps. I =

Explanation / Answer

1. F = i2*L*B

and B = u*i1/2*pi*d where u = 4pi *10^-7 T.m A^-1

so i2 = F*2*pi*d / L*u*i1

I2 = 327.27 A

B = u*n*I

where n = N/L

9 *10^-3 = 4*pi*10^-7 * (2000/0.9) * I

I = 3.22 A

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