The number of electrons in $2 \ C$ of charge is:

Which of the following charges is $NOT$ possible in Millikan's oil drop experiment?

Describe the activity to construct a simple electroscope.

What are called electrically charged and electrically neutral bodies?

Two identical spherical conductors $B$ and $C$ have equal radii and carry equal charges. They repel each other with a force $F$ when placed at a certain distance apart. $A$ third identical spherical conductor $A$,which is uncharged,is brought in contact with $B$ and then removed. It is then brought in contact with $C$ and removed. What is the new force of repulsion between $B$ and $C$?

When a proton is accelerated with $1 \, V$ potential difference,then its kinetic energy is .......... $eV$.