Question

There are $20$ divisions in the range $0$ to $0.5v$ in a Voltmeter, Therefore least count of the Voltmeger is ________.

• A. $0.020$
• B. $0.025$
• C. $0.050$
• D. $0.250$

Answer 1

Answer: (B)

$0.025$

$\begin{array}{cc}\text{Given -}& \text{A voltmeter with}20\text{div}\\ & \text{Range}=(0-0.5)V\end{array}$

$\begin{array}{c}\text{Least count}=1\text{division Reading}\\ \text{for maximum Reading we have}20div=0.5v\\ \Rightarrow 1div=\frac{0.5}{20}=0.025volt.\\ \text{Hence least count}=0.025\text{volts.}\end{array}$