1. Using a Mulitmeter A digital multimeter is a test tool used to measure two or more electrical values—principally voltage (volts), current (amps) and resistance (ohms). It is a standard diagnostic tool for technicians in the electrical/electronic industries.

2. Pressure - Voltage The pressure that pushes electrons in a circuit. Measured in volts (V).

3. Current - Amps The number of electrons flowing past a fixed point. Measured in amps (A).

4. Power - Watts The amount of electric current flowing due to an applied voltage. W = V x A Measured in watts (W).