question_answer

In the circuit shown in figure, cell is ideal and\[{{R}_{2}}=100\,\Omega \]. A voltmeter of internal resistance \[200\,\Omega \]. reads \[{{V}_{12}}=4V\] and \[{{V}_{23}}=6V\]between the pair of points \[1-2\] and \[2-3\] respectively. What will be the reading of the voltmeter in (volt) between the points\[1-3\]?

Answer:

12