A conducting sphere of radius $10\, cm$ is charged $10\,\mu \,C$. Another uncharged sphere of radius $20\, cm$ is allowed to touch it for some time. After that if the sphere are separated, then surface density of charges, on the spheres will be in the ratio of
$1:4$
$1:3$
$2:1$
$1:1$
$A$ and $B$ are two concentric spheres. If $A$ is given a charge $Q$ while $B$ is earthed as shown
Write important results regarding electrostatic of conductors.
The electric field near a conducting surface having a uniform surface charge density $\sigma $ is given by
A solid spherical conducting shell has inner radius a and outer radius $2a$. At the center of the shell is located a point charge $+Q$. What must the excess charge of the shell be in order for the charge density on the inner and outer surfaces of the shell to be exactly equal ?
A hollow closed conductor of irregular shape is given some charge. Which of the following statements are correct ?