Physics - Current Electricity Question with Solution | TestHub

Resistance of voltmeter and $60\Omega$ are in parallel. $\therefore$ Equivalent resistance $=\frac{60\times 40}{60+40}=\frac{60\times 40}{100}=24\Omega$ For the whole circuit, current $I=\frac{6\mathrm{V}}{(40+24)\Omega }=\frac{6}{64}=\frac{3}{32}\mathrm{A}$ The voltmeter reads potential difference across $60\Omega$. $\begin{array}{rl}& \therefore \text{ Voltmeter reading }=I\times R_{eq}\\ & =\frac{3}{32}\times 24=\frac{9}{4}\mathrm{V}=2.25\mathrm{V}\end{array}$