The figure shows a cross section of three parallel wires each carrying a current of 20 A. The currents in wires A and B are out of the paper, while that in wire C is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 2.0-m length of wire A?
A) 23 mN
B) 64 mN
C) 32 mN
D) 46 mN
E) 55 mN

Question

The figure shows a cross section of three parallel wires each carrying a current of 20 A. The currents in wires A and B are out of the paper, while that in wire C is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 2.0-m length of wire A? 
A) 23 mN 
B) 64 mN 
C) 32 mN 
D) 46 mN 
E) 55 mN

Quizplus · Accepted Answer

The Answer of The figure shows a cross section of three parallel wires each carrying a current of 20 A. The currents in wires A and B are out of the paper, while that in wire C is into the paper. If the distance R = 5.0 mm, what is the magnitude of the force on a 2.0-m length of wire A? 
A) 23 mN 
B) 64 mN 
C) 32 mN 
D) 46 mN 
E) 55 mN

The Figure Shows a Cross Section of Three Parallel Wires