The given plot shows the variation of U, the potential energy of interaction between two particles, with the distance separating them, r.
(l) B and D are equilibrium points.
(2) C is a point of stable equilibrium.
(3) The force of interaction between the two particles is attractive between points C and B, and repulsive between points D and E on the curve.
(4) The force of interaction between the particles is repulsive between points C and A. Which of the above statements are correct?
| A. |
1 and 3 |
| B. |
1 and 4 |
| C. |
2 and 4 |
 |
| D. |
2 and 3 |
At point C the potential energy is minimum , hence it is a point stable equilibrium. Also , from C to A, the slope is negative, ie; `(dU)/(dr)<0`
Hence , the force of interaction between the particles is repulsive between point C and A.