Final answer:
An analog volt meter operates by mechanical deflection to measure voltage. It uses a galvanometer to produce a proportional needle deflection.
Step-by-step explanation:
An analog volt meter operates based on the principle of mechanical deflection to measure voltage. It uses a galvanometer, which is a coil of wire with a small resistance, placed in series with the coil. When current flows through the coil, it produces a proportional needle deflection. By attaching a scale to the galvanometer, the meter can point to the corresponding voltage measurement.
For example, when the current increases, the galvanometer coil rotates further, causing the needle to move to a higher voltage value on the scale. Similarly, when the current decreases, the needle moves to a lower voltage value.