FIGURE 28-4 -Fig. 28-4 shows three long, parallel, current-carrying wires. The current directions are indicated for currents I₁ and I₃. The arrow labeled F represents the magnetic force acting on current I₃. The 3 currents have equal magnitudes. What is the direction of the current I₂? A)into the picture (in the direction opposite to that of I₁ and I₃) B)horizontal to the right C)vertical upward D)vertical downward E)out of the picture (in the same direction as I₁ and I₂)

Question

Quizplus · Accepted Answer

The magnetic force on I₃ is due to the magnetic fields created by I₁ and I₂. For the net force to be in the direction shown, I₂ must be opposite to I₁ and I₃, which are both out of the picture. Thus, I₂ must be into the picture.

FIGURE 28-4 -Fig. 28-4 Shows Three Long, Parallel, Current-Carrying Wires. the Current