====== Galvanometer ====== {{:physicsdemos:electricity_and_magnetism:dc_circuits:galvanometer.jpg?600|}} All of the working parts of this simple, open galvanometer are clearly visible, making it easy for one to understand how this sensitive current-measuring device works. By placing a large resistor in series with the galvanometer, one may also show how it can be used as a voltmeter. J4 PIRA DCS 5F40.20