The document describes an experiment to measure current using a half-wave rectifier circuit. The circuit includes a diode, capacitor, voltmeter, resistance box, and AC supply. The student measures voltage values across different resistances and calculates the average current output of 0.264 Amperes. Some key points made in the document are that half-wave rectifiers are rarely used due to high ripple factor, but are simple and cheap to construct. Precautions for the experiment and potential sources of error are also outlined.