Consider a fixed charge Q and another charge q is placed at a distance `x_(0)` from Q on a smooth plane surface. Find the velocity of charge q as a function of x.
`[[(Qq)/(2pi in_(0)m){(1)/(x_(0))-(1)/(x)}]^(1/2)]`

Charge q_(1) is fixed and another point charge q_(2) is placed at a distance r_(0) from q_(1) on a frictionless horizontal surface. Find the velocity of q_(2) as a function of seperation r between them (treat as point charges and mass of q_(2) is m)

Charge q_(1) is fixed and another point charge q_(2) is placed at a distance r_(0) form q_(1) on a frictionless horizontal surface.Find the velocity of q_(2) as a function of seperation r between them (treat the changes as point charges and mass of q_(2) is m)

Two point charges +q and -q are placed a distance x apart. A third charge is so placed that at the three charges are in equilibrium. Then

Three charges -q, Q and -q are placed at equal distances on a striaght line. If the potential energy of the system of three charges is zero, then what is the ratio of Q:q?

A positive point charge q_(1) is placed at (a,0) and another positive point charge q_(2) is placed at (0,a) . Find the force acting on q_(1) .

A positive point charge q_(1) is placed at (a,0) and another positive point charge q_(2) is placed at (0,a) . Find the force acting on q_(1) .

Two fixed point charges +4q and +q units are separeted by a distance 'x'. Where should a third point charge- q_0 be placed for it to be in equilibrium?

Two charge Q_1 and Q_2 are placed in xy plane at a distance x_1 and x_2 from origin a shown in figure. if electric field at O is same for both charge then find ratio Q_1 and Q_2 .

Two charge Q_1 and Q_2 are placed in xy plane at a distance x_1 and x_2 from origin a shown in figure. if electric field at O is same for both charge then find ratio Q_1 and Q_2 .