The curve represents the distribution of potential along the staight line joining the two charges `Q_1 and Q_2` (separated by a distance r) then which of the following statements are correct?

1. `|Q_1|gt|Q_2|`
2. `Q_1` is positive in nature
3. A and B are equilibrium points
4. C is a point of unstabkle equilibrium

Options

A. 1 and 2
B. 1,2,and 3
C. 1,2 and 4
D. 1,2,3 and 4

Answer

A

Explanation

Over `Q_1` potential is `+alpha`. Hence `Q_1` is positive.
`V_A=0` and A point is nearer to `Q_2`. Therefore `Q_2` should be negative and `|Q_1|gt|Q_2|`.
At A and B, potential is zero, not the force.
Equilibrium at C will depend on the nature of charge with is kept at C.