1929

Physics Electrostatics Level: High School

A 30 micro F capacitor is charged to 80 V and then connected across an initial uncharged capacitor of unknown capacitance C . If the final potential difference across the 30 micro F capacitor is 20 V , determine C .

Bonus : Charge of uniform density (3.5 nC/m) is distributed along the circular are shown in the figure at “click here” . Determine the electric potential (relative to zero at infinity) at point P .