A point charge `q` is located at the centre of a ring having radius `R` and charge `Q` .when it is displaced slightly,the point charge accelerated along `x` -axis to infinity,the ultimate speed of the point charge (consider no loss in radiation)

A point charge q of mass m is located at the centre of a ring having radius R and charge Q. When it is displaced slightly, the point charge accelerates along the x-axis to infinity, the ultimate speed of the point charge :-

A point charge Q is placed at the centre of a circular wire of radius R having charge q . Find the force of electrostatic interaction between point charge and the wire.

A point charge q_(0) is placed at the centre of uniformly charges ring of total charge Q and radius R. If the point charge is slightly displaced with negligible force along axis of the ring then find out its speed when it reaches a large distance.

A charge Q is placed at the centre of the line joining two point charges +q and +q as shown in figure. The ratio of charges Q and q is

A point charge q is located at the centre fo a thin ring of radius R with uniformly distributed charge -q , find the magnitude of the electric field strength vectro at the point lying on the axis of the ring at a distance x from its centre, if x gt gt R .

A ring of radius R has uniformly distributed charge q. A point charge Q is placed at the centre of the ring. (a) Find the increase in tension in the ring after the point charge is placed at its centre. (b) Find the increase in force between the two semicircular parts of the ring after the point charge is placed at the centre. (c) Using the result found in part (b) find the force that the point charge exerts on one half of the ring.

A positive charge +q is located at a point. What is the work done if a unit positive charge is carried once around this charge along a circle ofradius r about :

A point charge q is placed at a distance d from centre of a uniformly charged conducting spherical shell of radius R and having charge Q as shown. Magnitude of electric field intensity at point P just inside the shell due to charge on shell is

A charge particle of charge q & mass m is projected towards the center of uniformly charged ring of radius R& carrying a charge Q from a distance of sqrt(3)R from the center along the axis,find the minimum value of velocity of projection (in m/s ) so that particle reaches to x=-oo where x - axis is along the axis of ring & center of ring is at origin.(given Q=6 mu c,q=3 mu c,m= 2gm,R=1m )