In the figure, OA and OB show the variation of electric potential \(V\) at a point due to two point charges \(Q_1\) and \(Q_2\) with \(\frac{1}{r}\) respectively. Here \(r\) represents the distance of the point from the two point charges.
(I) Identify the nature of the two charges \(Q_1\) and \(Q_2\).
(II) What is the value of \(\left(\frac{Q_1}{Q_2}\right)\)? Justify your answer.
Show Hint
In graphs of \(V\) vs \(\frac{1}{r}\):
- A positive slope represents a positive point charge.
- A negative slope represents a negative point charge.
- The steepness (absolute value of the slope) is directly proportional to the magnitude of the charge.