Q. The electric field strength depends only on the $x , y$ and $z$ coordinates according to the law $E =\frac{ a ( x \hat{ i }+ y \hat{ j }+ z \hat{ k })}{\left( x ^{2}+ y ^{2}+ z ^{2}\right)^{3 / 2}}$, where $a =122.5 SI$ unit and is a constant. Find the potential difference (in volt) between $(3,2,6)$ and $(0,3,4)$.
Electrostatic Potential and Capacitance
Solution: