Two long parallel wires carry currents of 200 A and 100 A in opposite directions

Question

Two long parallel wires carry currents of 200 A and 100 A in opposite directions. The distance between the wires is 3 cm. A.) What is the magnitude of the force per unit length exerted iby one wire on the other? B.) What are the directions of the forces on each wire? C.) what is the total force exerted on a 10 cm length of the 100 A wire? D.) From this force, compute the strength of the magnetic field produced by the 200 A wire, at the position of the 100 A wire(Hint: F =I1B where I is the current,1 is the length from c. and B is the magnetic field)? E.)What is the direction of the magnetic felid produced by the 200 A wire at the position of the 100 A wire?

Explanation / Answer

f/l = u0 / 2*pi I1*I2/d

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