Question

A DC voltmeter has a sensitivity of $1000\Omega /volt.$ When it measures half of full scale in 100 V range, the current though the voltmeter is

• A. $100mA$
• B. $1mA$
• C. $0.5mA$
• D. $50mA$

Answer 1

The correct option is C $0.5mA$

$S=\frac{1}{I_{fsd}}$

$\Rightarrow I_{fsd}=\frac{1}{1k\Omega /V}=1mA$

$\text{For half scale,}$

$I_{hsd}=0.5mA$