PHYSICS · Multi-part · A Level · Physics · Fields and their consequences · Fields and their consequences
Problem
A bar magnet moves towards a coil of wire. The ends of the coil of wire are connected to a galvanometer.
(a) What happens in the coil as the north pole of the magnet approaches it?
(b) The coil behaves like an electromagnet. Which pole, north or south, will the nearest end of the coil to the north pole of the magnet have? Explain your answer using Lenz's law.