Question
The wire carrying 400 A to the motor of a commuter train feels an attractive force of $4.00 \times 10^{-3} \textrm{ N/m}$ due to a parallel wire carrying 5.00 A to a headlight. (a) How far apart are the wires? (b) Are the currents in the same direction?
1. $0.100 \textrm{ m}$
2. Same direction
Solution Video