Correct Answer - Option 1 : 1000 Ω/V
Concept:
Sensitivity of Rectifier Instruments:
Sensitivity is defined as the deflection per unit current flowing in the coil.
The sensitivity of the voltmeter also depends on the circuit resistance which is known as the loading effect.
DC Sensitivity(SDC):
Deflection per unit DC current flowing in the coil.
\({S_{DC}} = \frac{1}{{{I_{fs}}}}(Ω /V)\) ----(1)
Where Ifs = Full-scale deflection current
Calculation:
Ifs = 1 mA
From equation (1), Sensitivity can be calculated:
\({S_{DC}} = \frac{1000}{{{1}}}(Ω /V)\)
S = 1000 Ω/V
