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 ▸Derive an expression to show that for satellites in a circular orbit T² ∝ r ³ where T is the period of orbit and r is the radius of the orbit.
Define the moment of a couple
A small ball is projected with speed 15 m/s at an angle of 60 degrees above the horizontal. Find the distance from the point of projection of the ball at the instant when it is travelling horizontally.
What are the 'rules' of oscillation?