If the voltage between the plane of a parallel-plate capacitor is doubled, the c
ID: 1425278 • Letter: I
Question
If the voltage between the plane of a parallel-plate capacitor is doubled, the charge on the capacitor? is tripled. is doubled. is halved. quadruples. remains the same. A parallel-plate capacitor carries charge Q and is then disconnected from a battery. The two plates are initially separated by a distance d. Suppose the plates are pulled apart until the separation is 2d. How has the energy stored in this capacitor changed? Increased by 2 Decreased by 2 Doesn't change at all. Use the following information in the next three questions In the figure, an 8.0 pF capacitor is charged by a 12.0-V battery and then is disconnected from the battery. This capacitor (C_1) is then connected to a second(initially uncharged)4.0 mu F capacitor(C_2). How much energy is initially stored in capacitor C_1? 4.0 mu C 8.0 mu C 12 muC 48 mu C. 96 mu D. How much charge is initially stored on capacitor C_1? 12 mu 48.mu C 96 mu C 384 mu C 576 mu JExplanation / Answer
17. Using Q=CV
Hence doubled
18. decreased by factor 2
19. Using
Q=CV
96uC
20. 0.5*CV2 = 576uJ