State Lenz's law and hence describe and explain what happens to a magnet travelling through a metal tube
Lenz's law states that the direction of current due to emf induced by a changing magnetic flux is always such that it opposes the change that induced it.
When a magnet travels through a copper tube this induces an emf and current in the tube, this in turn produces a magnetic field which opposes the direction of motion of the magnet. This means the magnet decelerates through the tube.
MC
Related Physics A Level answers
All answers ▸If photons are little particles emitted by atoms, where were they before they got emitted?
How would I derive Kepler's third law from Newton's law of gravitation and the equations of circular motion?
A ball of mass 0.25 kg is travelling with a velocity of 1.2 m/s when it collides with an identical, stationary ball. After the collision, the two balls move together with the same velocity. How fast are they moving?
A trolley of mass 0.75kg is running along a frictionless track at a constant speed of 0.7ms-1, as the trolley passes below a mass of 0.5kg the mass drops a short vertical distance onto the trolley. Calculate the new velocity of the trolley and mass.