The sensitivity of a voltmeter using 0-5 mA meter movement is

Concept:

• Sensitivity of voltmeter is commonly expressed in ohms per volt
• Sensitivity of voltmeter is the ratio of resistance of the instrument (Rm) to full scale reading of the same.
• Sensitivity (S) of a voltmeter is the reciprocal of full-scale deflection current (Ifsd)

Total internal resistance of a voltmeter is given by

\({R_m} = \frac{{{V_{fsd}}}}{{{I_{fsd}}}}\)

Rm = full scale range of voltmeter × sensitivity

Rv = Vfsd × S

Calculation:

Given, Ifsd = 5 mA

Sensitivity (S) = 1 / Ifsd  = 1 / 5 mA = 200 Ω/V