Use Gauss's law to obtain the expression for electric field due to a thin infinitely long straight uniformly charged wire.
Two point charges having equal charges separated by 1 metre distance experience a force of 8 N. What will be the force experienced by them, if they are held in water at the same distance?
(Given, Kwater = 80).
Use Gauss' law to derive the expression for the electric field between two uniformly charge parallel sheets with surface charge densities and , respectively.
Can a body have a charge of 0.8 × 10^(-19) C? Justify your answer by comment?
Write an expression for the flux , of the electric field through an area element .
A thin metallic spherical shell of radius R carries a charge Q on its surface. A point charge is placed at the centre C and another charge +2Q is placed outside the shell at A at a distance x from the centre as shown in the figure.
Find the electric flux through the shell.
State the law used.
Find the force on the charges at the centre C of the shell and at the point A.
The electric field required to keep a water drop of mass m just to remain suspended, when charged with one electron, is
The electric flux through a closed Gaussian surface depends upon
Five point charges, each of charge +q are placed on five vertices of a regular hexagon of side l. Find the magnitude of the resultant force on a charge –q placed at the centre of the hexagon.