Two equal negative charges are fixed at the points $ [0, a ]$ and $[0, -a]$ on the $y-$ axis. A positive charge $Q$ is released from rest at the points $[2a, 0]$ on the $x-$axis . The charge $Q$ will
execute simple harmonic motion about the origin
move to the origin and remain at rest
move to infinity
execute oscillatory but not simple harmonic motion.
Why is an electric force conservative ?
The unit of electric permittivity is
Write some important points for vector form of Coulomb’s law.
Write Coulomb’s law and explain its scalar form.
A charge $q$ is placed in the middle of a line joining the two equal and like point charge $Q$. This charge $q$ will remain in equilibrium for which value of $q$ is