In the following diagram, the position of he needle is shown on the scale of a voltmeter. The least

Question

In the following diagram, the position of he needle is shown on the scale of a voltmeter. The least count of the voltmeter and the reading shown by it respectively are\ \

Professor PC Thomas Classes · Answer

(c) : Least count of any scale is the value measured by a single division on it.\ Total number of divisions on the given scale $=20$\ Maximum value that can be measured by the given scale $=3 \mathrm{~V}$\ $	herefore \quad$ Least count $=\frac{3}{20}=0.15 \mathrm{~V}$\ i.e., one division of the scale is equal to 0.15 V .\ $	herefore \quad$ Reading shown by the scale $=12 	imes 0.15=1.8 \mathrm{~V}$\