ExpEYES

In the earlier experiments we have seen that:

• A current can create a magnetic field
• A changing magnetic field can induce a voltage across a conductor

In this experiment, we combine both these phenomena. A conductor carrying Ac will have a continuously changing magnetic field around it. This field should induce a voltage across another conductor placed there.

• Connect a coil from WG to Ground
• Connect A1 to WG
• Connect another coil from A2 to ground
• keep the coils close
• Insert some magnetic material into the coils

The experiment setup and the results are shown below. This experiment demonstrates the working of an AC transformer. The efficiency is very poor because the coupling between the coils is very weak. It requires proper geometry and high permeability material like iron or ferrite core.