P17.4) A capacitor with charges +Q and -Q has a plate separation of 3 millimeters. Take Q = 1 mC (10-3 C) and the area of the capacitor plates to be 100 cm. a) What is the capacitance of the capacitor? b) How much energy is stored in the capacitor? c) How much would the stored energy of the capacitor change if the area of the plates were doubled. Assume the plates are not connected to anything so their charge remains unchanged. d) How much would the stored energy of the capacitor change if a dielectric (k = 1.5) were inserted into the gap between the plates. Assume the plates are not connected to anything so their charge remains unchanged. e) If an electron were released from rest at a distance of 2 mm from the -Q plate, which plate would it strike and with what velocity? y = 3mm +Q -e y = 2mm y=0 -Q