An electric dipole is orientated antiparallel to an electric field e. find the work done by the electric field to reorientate it along the field. (0.5p) consider an ellipsoidal perfect conductor. two identical charges q are located at a distance l from its surface on the major (long) and minor (short) axes. which charge will experience stronger electrostatic force? (0.5p) a flat capacitor with two plates separated by air is charged to q. thereafter, the space between the plates is filled with water by keeping the potential difference unchanged is the energy which can be extracted from the capacitor larger, equal, or smaller than the energy required to charge the air-filled capacitor?