What is the significance of voltmeter sensitivity expressed in ohms per volt?

Analog voltmeters are essentially sensitive current meters placed in series with a large multiplier resistor. The sensitivity rating, expressed in ohms per volt, indicates the total resistance the meter presents to the circuit for a given voltage range. To find the actual input impedance of the meter, you simply multiply the ohms-per-volt rating by the full-scale voltage of the selected range. For example, a 20,000 ohms/volt meter set to the 10V scale presents an input impedance of 200,000 ohms to the circuit under test. Knowing this impedance is crucial because a meter with an input impedance that is too low will draw noticeable current from the circuit. This phenomenon, known as meter loading, alters the voltages in the circuit and results in falsely low readings.