PHYS 1112 Module 10.4

Magnetic Force between Two Parallel Currents

Practice!

Practice 10.4.1
You have two parallel wires carrying currents in the same direction.

What is the direction of the magnetic field that is created by I1 at the position where I2 is located?
Check your answer: F. Out of the page
Practice 10.4.2
You have two parallel wires carrying currents in the same direction.

What is the direction of the magnetic force due to I1 that acts on I2?
Check your answer: B. Upward
Practice 10.4.3
In the two situations there are two parallel wires carrying current in opposite directions (A) and in the same direction (B). What will happen to the wires?
Check your answer: B. The wires in (A) will repel and the wires in (B) will attract.
Practice 10.4.4
A current I flows in the +y direction in an infinite wire. A current I also flows in the loop as shown. What is Fx, the net force on the loop in the x-direction?
Check your answer: A. F_x points to the left