Figure shows a uniformly charged hemisphere of radius R. It has a volume charge density `rho`. If the electric field at a point 2R, above the its center is E, then what is the electric field at the point 2R below its center?

A sphere of radius R has a charge density sigma . The electric intensity at a point at a distance r from its centre is

There is a hemisphere of radius R having a uniform volume charge density rho . Find the electric potential and field at the centre

An insulated sphere of radius r haas a uniform volume charge density lambda . The electric field at a point A , which is at distance r from its centre is given by (R gt r)

(a) Use Gauss's law to show that due to a uniformly charged spherical shell of radius R, the electric field at any point situated outside the shell at a distance r from its centre is equal to the electric field at the same point, when the entire charge on the shell were concentrated at its centre. Also plot the graph showing the variation of electric field with r, for r le R and r ge R . (b) Two point charges of +1 muC and +4 muC are kept 30 cm apart. How far from the +1muC charge on the line joining the two charges, will the net electric field be zero ?

The diagram shows a part of uniformly charged disc of radius R having surface charge densityo. If electric potential at the center O is Then find N. 1 N Х OR 280 R R/2

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

Figure shows a uniformly charges hemispherical shell. The direction of electric field at point p that is off centre (but in the plane of the largest circle of the hemisphere), will be along

A uniformly charged disc of radius R having surface charge density sigma is placed in the xy plane with its center at the origin. Find the electric field intensity along the z-axis at a distance Z from origin :