Two long, parallel wires are separated by a distance of 2.40 cm . The force per

Question

Two long, parallel wires are separated by a distance of 2.40 cm . The force per unit length that each wire exerts on the other is 3.30×105 N/m , and the wires repel each other. The current in one wire is 0.600 A .

Part A

What is the current in the second wire?

Part B

Are the two currents in the same direction or in opposite directions?

Two long, parallel wires are separated by a distance of 2.40 cm . The force per unit length that each wire exerts on the other is 3.30×105 N/m , and the wires repel each other. The current in one wire is 0.600 A .

Part A

What is the current in the second wire?

Part B

Are the two currents in the same direction or in opposite directions?

Explanation / Answer

A] We know that the force per unit length is F/L

= uoII'/(2*pi*r)

so I = F/L *2*pi*r/(u0*I')

= 3.30*10^-5*2*pi*0.024/(4*pi*10^-7*0.6)

= 6.6 A

B] In the same direction

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