A particle of mass `1 kg` and charge `1//3 mu C` is projected toward a nonconducing fixed spherical shell of radius `r = 1 mm` having the same charge uniformly distributed on its surface. Find th minimum initial velocity of projection requires if the particle just grazes the shell.
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A thin conducting spherical shell of radius R has a charge Q which is uniformly distributed on its surface . The correct plot for electroistatic potential due to this spherical 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 )

There is a hemispherical shell having charge Q uniformly distributed on its surface. Radius of the shell is R. Find electric potential and field at the centre (of the sphere).

Two concentric spherical shells of radius R_(1) and R_(2) (R_(2) gt R_(1)) are having uniformly distributed charges Q_(1) and Q_(2) respectively. Find out total energy of the system.

Two concentric spherical shells of radius R_(1) and R_(2) (R_(2) gt R_(1)) are having uniformly distributed charges Q_(1) and Q_(2) respectively. Find out total energy of the system.

A uniform charged shell is reassembled in the form of a sphere of same radius but charge uniformly distributed through out of its volume. Find the ratio of initial potential energy to work required for it.

A positive charge q of mass m is projected , a very large distance , toward a fixed non-conducting sphere having Q charge uniformly distributed inside it, as shown in figure. If the charge q just grazes the sphere , then the speed of projection u is kappa=(1/4piepsilon_0).