What charge would be required to electrify a sphere of radius 25 cm, so as to get a surface charge density of `(3)/(pi)Cm^(-2)`?

Find the surface area of a sphere of radius 7 cm.

Find the surface area of a sphere of radius 14cm.

Find the surface area of a sphere of radius 7cm.

The radius of a sphere is 1.23 cm. What is its surface area?

The magnitude of the electric field on the surface of a sphere of radius r having a uniform surface charge density sigma is

A charge Q is placed at the centre of an uncharged, hollow metallic sphere of radius a. (a) Find the surface charge density on the inner surface and on the outer surface. (b) If a charge q is put on the sphere, what would be the surface charge densities on the inner and the outer surface? (c) Find the electric field inside the sphere at a distance x from the centre in the situations (a) and (b).

A charge Q is placed at the centre of an uncharged, hollow metallic sphere of radius alpha. (a) Find the surface charge density on the inner surface and on the outer surface. (b) If a charge q is put on the sphere, what would be the surface charge densities on the inner and the outer surface?

(a) Using Gauss's law, derive an expression for the electric field intensity at any point outside a uniformly charged thin spherical shell of radius R and charge density sigma C//m^(2) . Draw the field lines when the charge density of the sphere is (i) positive, (ii) negative. (b) A uniformly charged conducting sphere of 2.5 m in diameter has a surface charge density of 100 mu C//m^(2) . Calculate the (i) charge on the sphere (ii) total electric flux passing through the sphere.

Find the surface area of a sphere of radius: 10.5 cm (ii) 5.6 cm (iii) 14 cm

Find the surface area of a sphere of radius: 10.5 cm (ii) 5.6 cm (iii) 14 cm