Assuming that the charge on an atom is distributed uniformly is a sphere of radius `10^(-10)` m, what will be the electric field at the surface of the gold atom ? For gold, Z=79.

Assume that total positive charge of gold nucleus (atomic number, Z = 79) is distributed uniformly in a spherical region of radius 9.6xx10^(-15)m . Calculate electric potential at the surface of this sphere.

A charge of 1500 muC is distributed uniformly over a very large sheet of surface area 300m^(2) . Calculate the electric field at a distance of 25 cm.

A charge Q is distribution over a metal sphere of radius R. What is the electric field and electric potential at the centre ?

Assume that the nucleus of the fluorine atom is a sphere of radius 5xx10^(-3) cm. What is the density of matter in the nucleus?

The radius of a gold nucleus (Z=79) is about 7.0 xx 10^9-15) m . Assume that the positive charge is distributed uniformly throughout the the nuclear volume. Find the strength of the electric field at (a) the surface of the nucleus and (b) at the middle oint of a radius. Remembering that gold is a conductor, is it justifild to assume that the positive charge is uniformly distributed over the entire volume of the nucleus and does not come to the ourer surface?

A source of sound emits 200 piW power which is uniformly distributed over a sphere of radius 10 m. What is the loudness of sound on the surface of the sphere?

A hollow insulated conducting sphere of radius 2m, is given a charge of 5 muC . What will be the electric field at the centre of the sphere?

Charges q is uniformly distributed over a thin half ring of radius R . The electric field at the centre of the ring is