Voltmeter sensitivity is usually expressed in ohms per volt. This means that a voltmeter with a sensitivity of 20 kilohms per volt would be a:

Voltmeter sensitivity in "ohms per volt" is mathematically the reciprocal of the meter's full-scale current (1 / I). It represents how much series resistance is needed for each volt of full-scale reading. To find the current rating of the meter movement, you can use Ohm's Law with 1 volt and the given ohms-per-volt sensitivity. Dividing 1 volt by 20,000 ohms gives a full-scale deflection current of 0.00005 amperes. Converting this decimal figure into a standard metric prefix requires multiplying by 1,000,000 to reach microamperes. 0.00005 amperes multiplied by 1,000,000 results in 50 microamperes.