This question was previously asked in

VSSC (ISRO) Technician B (Electronic Mechanic) 2012 Official Paper (Held on 22 Dec 2012)

Option 3 : 500 μA

**Concept:**

\(Current \ Sensitivity=\frac{Voltage \ Sensitivity}{Internal Resistance}\) ---(1)

Calculation:

Given:

Voltage Sensitivity = 10 mV

Internal Resistance = 20 ohms

Using equation (1) Current sensitivity can be calculated as:

\(Current \ Sensitivity=\frac{10 \ × \ 10^{-3}}{20}\)

Current sensitivity = 500 × 10^{-6}

**Current sensitivity = 500 μA **