Saved Bookmarks
| 1. |
Two point charge (Q each) are placed at (0,y) and (0,-y). A point charge q of the same polarity can move along X-axis. Then :A. The force on q is maximum at `xpmy//sqrt(2)`B. the charge on q in equilibrium at the originC. the charge q performs an oscillatory motion about the originD. |
|
Answer» Correct Answer - A::B::D At a popint with corrdinates (x,0) the force is `F=(2Qq)/(4piepsilon_(0))(x)/((x^(2)+y^(2))^(3//2))`. For F to maximum, equating `(dF)/(dx)` to zero give `xpm(y)/(sqrt(2))`. The charge is obviously in equilibrium at the origin. However, the equilibrium is not stabel since the force is repulsive and hance will not be able to restore the charge at the origin The charge therefore connot perform oscillatory motion. |
|