A charge `q` of mass `m` is projected form a long distance with speed `v` towards another stationery particle of same mass and charge the distance of closet approach of the particles is

A particle P of charge q and m , is placed at a point in gravity free to move. Another particle Q, of same charge and mass , is projected from a distance r from P with an initial speed v_(0) towards P , initial the distance between P and Q decreases and then increases. The potential energy of the system of particles P and Q, at closest separation is

A particle (A) having charge Q and mass m is at rest and is free to move. Another particle (B) having charge q and mass m is projected from a large distance towards the first particle with speed u. (a) Calculate the least kinetic energy of the system during the subsequent motion. (b) Find the final velocity of both the particles. Consider coulomb force only.

Figure shows a charge +Q clamped at a point in free space. From a large distance another charge particle of charge -q an.d mass m is thrown toward +Q with an impact parameter d as shown with speed v. Find the distance of closest approach of the two particles.

A particle of mass M and charge q, initially at rest, accelerated by a uniform electric field E through a distance D and is then allowed to approach a fixed static charge Q of the same sign. The distance of the closest approach of the charge q will then be