Messages posted by devilguy_deepak@yahoo.com

1. A spherical shell made of plastic contains a charge q distributed uniformly over its surface. What is the electric field inside the shell? If the shell is hammered to deshape it without altering the charge, will the field inside be changed? What happens if the shell is made of a metal.2. A point charge q is placed in the cavity in a metal block. If a charge Q is brought outside the metal, will charge q feel an electric force?

Yes, it can be done by using a torsional balance ( a sensative device used to measure force ). Even coulomb used the same to measure the force between two charged metallic spheres. If you would remember, cavendish used it to measure the feeble gravitational force between two objects to verify newton's law of gravitation.

a charge q is uniformly distributed on a thin spherical shell. What is the field at the center of the shell? If a point charge is brought close to the shell, will the field at center change? Does answer depends on whether the shell is conducting or non-conducting?

A circular ring of radius r made of a non-conducting material is placed with its axis parallel to a uniform electric field. The ring is rotated about a diameter through 180 degree. Does the flux of electric field increase or decrease?

A small plane area is rotated in an electric field. In which orientation of the area is the flux of electric field through the area maximum? In which orientation is it zero?