A thick shell with inner radius R and outer radius 3R has a uniform charge density `sigma c//m^(3)`. It has a spherical cavity of radius R as shown in the figure. The electric field at the centre of the cavity is

A thick shell with inner radius R and outer radius 3R has a uniform charge density rho.It has a spherical cavity of radius R as shown in figure.The electric field at the centre of the cavity is (n rho R)/(12 varepsilon_(0)) . Find n.

A spherical shell of radius R has a charge +q units. The electric field due to the shell at a point

A solid of radius 'R' is uniformly charged with charge density rho in its volume. A spherical cavity of radius R/2 is made in the sphere as shown in the figure. Find the electric potential at the centre of the sphere.

A solid sphere having radius R and uniform charge density rho has a cavity of radius R/2 as shown in figure.Find the value of |E_A /E_B|

A solid non-conducting sphere of radius R is charged with a uniform volume charge density rho . Inside the sphere a cavity of radius r is made as shown in the figure. The distance between the centres of the sphere and the cavity is a. An electron of charge 'e' and mass 'm' is kept at point P inside the cavity at angle theta = 45^(@) as shown. If at t = 0 this electron is released from point P, calculate the time it will take to touch the sphere on inner wall of cavity again.

A sphere of radius 2R and mas M has a spherical cavity of radius R as shown in the figure. Find the value of gravitational field at a point P at a distance of 6R from centre of the sphere.

Consider a uniform charged sphere of charge density r and radius R.If the cavity of radius R/2is made inside the sphere and the removed part is again placed near the charge distribution as shown in the figure. If the electric field at the centre of the cavity is (rho R)/(n varepsilon_(0) find n .

7.Consider a uniform charged sphere of charge density p and radius R.If the cavity of radius R/2is made inside the sphere and the removed part is again placed near the charge distribution as shown in the figure.If the electric field at the centre of the cavity is (rho R)/(n varepsilon_(0)) find n .

A solid sphere having radius R and uniform charge density rho has a cavity of radius R/2 as shown in figure then the value of |(E_(A)/(E_(B)))| = (m)/(17) .Find the value of m

A spherical shell of radius R has a uniformly distributed charge ,then electric field varies as