An analog voltmeter is a measuring instrument that indicates voltage using a pointer moving across a calibrated scale. Inside the meter, a mechanism—often a D’Arsonval galvanometer—converts electrical current into mechanical movement. When current flows through the meter, an electromagnetic force is generated, causing the pointer to deflect. The angle of deflection is proportional to the applied voltage. The more voltage there is, the farther the pointer moves. Because it uses a moving pointer, it’s easy to see how the voltage changes in real time.
