Calculate the sensitivity of 200 μA meter movement that is to be used as a DC voltmeter.

The correct answer is option 1): (5 KΩ/V)

Concept:

• 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.

• Where I_fs = Full-scale deflection current

Calculation:

Given

I_fs = 200 μA

• From equation (1),
• Sensitivity can be calculated:       = 5 kΩ/V