# Voltmeter sensitivity is defined as

### Right Answer is:

Reciprocal of the full-scale deflection current

#### SOLUTION

A voltmeter is an instrument used for measuring the electrical potential difference between two points in an electric circuit.

**Sensitivity:** The sensitivity of an instrument indicates the capacity of the instrument to respond truly to the change in the output, corresponding to the change in the input.

The sensitivity of a voltmeter is given in ohms per volt. It is determined by dividing the sum of the resistance of the meter (R_{m}) plus the series resistance (R_{s}), by the full-scale reading in volts. In equation form, sensitivity is expressed as follows:

**Sensitivity, S = (R _{m} + R_{s}) ⁄ V_{in}**

**This is the same as saying that the sensitivity is equal to the reciprocal of the full-scale deflection current.** In equation form, this is expressed as follows:

**S = Ohm/Volt = 1/Amp = 1/I _{fsd}**