For the hemisphere of radius `R` shown in the figure the surface charge density `sigma` varies with `theta` (shown in figure) as `sigma=sigma_(0) costheta` the total charge on the sphere is

Unit of surface charge density ( sigma) is…….

The linear charge density of a uniform semicircular wire varies with theta shown in the figure as lambda=lambda_(0)costheta if R is the radius of the loop ,of the charge on the wire is

A sphere has surface charge density sigma . It is surrounded by a spherical shell. The surface charge density on the spherical shell is

The electric intensity at a point near a charged conductor of surface charge density sigma is

A solid sphere of radius R has a spherical cavity of radius r as shown in the figure. If the volume charge density sigma is uniformly distributed over the whole volume of the sphere, then electric field strength at the centre of the sphere will be

A solid sphere of radius R has a spherical cavity of radius r as shown in the figure. If the volume charge density sigma is uniformly distributed over the whole volume of the sphere, then electric field strength at the centre of the sphere will be

If 'R' is radius of a sphere and Q is charge supplied to it, then the surface charge density (sigma) is given by

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

A non - conducting disc of radius R is uniformly charged with surface charge density sigma . A disc of radius (R )/(2) is cut from the disc, as shown in the figure. The electric potential at centre C of large disc will be

A large plate with uniform surface charge density sigma is moving with constant speed v as shown in the figure. The magnetic field at a small distance from plate is