Linking electricity and magnetism - Linking electricity and magnetism So far we've dealt with electricity and magnetism as separate topics From now on

Linking electricity and magnetism So far we've dealt with electricity and magnetism as separate topics. From now on we'll investigate the inter-connection between the two, starting with the concept of induced EMF. This involves generating a voltage by changing the magnetic field that passes through a coil of wire. We'll come back and investigate this quantitatively, but for now we can just play with magnets, magnetic fields, and coils of wire. You'll be doing some more playing like this in one of the labs. There are also some coils and magnets available in the undergraduate resource room - please feel free to use them. First, connect a coil of wire to a galvanometer, which is just a very sensitive device we can use to measure current in the coil. There is no battery or power supply, so no current should flow. Now bring a magnet close to the coil. You should notice two things: 1. If the magnet is held stationary near, or even inside, the coil, no current will flow through the coil.