When a glass rod is rubbed with silk, it
Gains electrons from silk
Gives electrons to silk
Gains protons from silk
Gives protons to silk
Find change in mass of a body if it is given $+2C$ charge.
Discuss the historical observation of frictional electrics.
A small sphere of radius $r_{1}$ and charge $q_{1}$ is enclosed by a spherical shell of radius $r_{2}$ and charge $q_{2} .$ Show that if $q_{1}$ is positive, charge will necessarily flow from the sphere to the shell (when the two are connected by a wire) no matter what the charge $q_{2}$ on the shell is.
A body can be negatively charged by
What is called polarity of electric charge ?