Question

There are $20$ divisions in the range $0$ to $0.5$ V in Voltmeter, Therefore least count of the Voltmeter is ______

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

Answer 1

Answer: (B)

$0.025$

$\begin{array}{c}\text{Given-}\text{voltmeter with}20\text{divisions.}\\ \text{Range}(0-0.5)V\\ \text{Maximum Reading of voltmeter}=0.5V\\ \Rightarrow 20div=0.5V\\ \Rightarrow 1\text{div}=0.025V\\ \Rightarrow \text{Least count of voltmeter}=1div=0.025\text{volt}\end{array}$