Calculate the electric potential at a distance of 20.0cm from a point charge of 0.015C placed in air of permittivity (Take \(\frac{1}{4πεo}\) as 9.0 x 10\(^9\) Nm\(^2\)C\(^2\))
If the current in the resistor R in diagram above is 0.05A, calculate the p.d. across the inductor.
