List of top Physics Questions on potential energy asked in BHU UET

The potential energy of a simple harmonic oscillator when the particle is half way to its end point is - (where, $E$ is the total energy)

An electric charge $10^{-3} \mu C$ is placed at the origin $(0,0)$ of $X-Y$ coordinate system. Two points $A$ and $B$ are situated at $(\sqrt{2}, \sqrt{2})$ and $(2,0)$ respectively. The potential difference between the points $A$ and $B$ will be