Two current carrying wires are placed next to each other and anti-parallel currents are allowed to flow. Is the magnetic force between the wires attractive or repulsive?
Consider the first wire on the left with current running up (arbitrary choice). By the 1st right hand rule, the magnetic field anywhere on the right will be into the page. By the 2nd right hand rule, the force is to the left, so repulsive.
Related Physics A Level answers
All answers ▸(ii) Describe and explain how the horizontal component of the water jet varies from point X to point Y. (2 marks)
What are the main differences between magnetic and electric fields?
Given a projectile is launched, from rest, at an angle θ and travels at a velocity V, what is the range and path of motion of the projectile? (Ignore air resistance.)
A stationary particle explodes into 3: A (to the left), B and C (both to the right). B has mass m and speed 3v. C has mass 2m and speed v. A has speed 2v. What is the mass of A in terms of m?