Question

3. (6 points) Four parallel plate capacitors: A, B, C, and D are shown in figure below where each capacitor carries the same charge q and has the same plate area A. As per the figure, the distance between the capacitor plates are 2d, 4d, 2d andd for the capacitors A, B, C, and D, respectively. Capacitor A is maintained in vacuum while capacitors B, C, and D contain dielectrics with constant k = 4. A B C D k k k 2d 4d 2d d a. List the capacitors in order of decreasing capacitance b. Which capacitor has the smallest potential difference between its plates? c. Which capacitor is storing the largest amount of electric potential energy? show calculations or explanations to support your answer.

Answer 1

Question, 3 A is CA= ay capacitance of capacitance of B is to A 2d KEOA Ad 460 A Ad to A capacitance of cis Cc to A - KEOA 2d AEA 20 2 EOA d capacitance of Dis с. 2EA KEA = 4 Go A d Co> c>c> А i's Since, C Potential diffence between plates Va q je vať [9 = Constant] Somallest potential difference between flakes is for capacitost Capacitor D. c) Electrical energy stored in a Capacitore is U = q² cuale [ for q = Constant] m; Largest stored energy is in capacitor A. 2c