90. Voltage and Current Measurements

Several multirange meters for measuring voltage and current in AC or DC are available including two large Leybold meters that can be used to monitor voltage and current in a circuit, and a large display digital multimeter that will measure voltage, current, resistance, and temperature.

Some professors have used the digital ohmmeter as a "lie-detector" -- a student volunteer was called up to answer embarrassing questions while holding the leads of the ohmmeter.

There are also large standing galvanometers, a model of a meter movement, and a measuring amplifier reading out onto a large meter for measuring small currents of 10-7 to 10-11 amps.