A 20μF capacitor charged to 2.0 kV and a 40μF capacitor charged to 3.0 kV are connected to each other, with the positive plate of each connected to the negative plate of the other. What is the final charge on the 40μF capacitor after the two are so connected? Select one: a. 18 mC b. 20 mC c. 120 mC d. 40 mC e. 80 mC

A capacitor is connected to a battery and given time to reach its full charge. You then slide a sheet of plastic between the plates of the capacitor, while holding the potential difference across the capacitor constant by leaving the battery connected. Which of the following has increased as a result of this change? I. The capacitance of the capacitor. II. The potential difference across the capacitor. III. The charge on the plates of the capacitor. IV. The energy stored by the capacitor.

A fully charged capacitor can store 500 J of energy. Assuming it is charged using the typical 120V of potential, what must be the capacitance? a. 23 mF b. 69 mF c. 128 mF d. 424 mF

The plates of a parallel-plate capacitor are connected to a battery. if the distance between the plates is halved, the energy of the capacitorA. Increases by a factor of 4.                   B. Doubles.C. Remains the same.                              D. Is halved.E. Decreases by a factor of 4.

A 55 pF capacitor is charged to a potential difference of 500 V. Its terminals are then connected to those of an uncharged 15 pF capacitor. Part 1 What is the original charge on the 55 pF capacitor? Enter your answer in units of nC. number (rtol=0.03, atol=1e-08) nC Part 2 What is the charge on the 55 pF capacitor after the connection is made? Enter your answer in units of nC. Q1 = number (rtol=0.03, atol=1e-08) nC Part 3 What is the charge on the 15 pF capacitor after the connection is made? Enter your answer in units of nC.

What is the potential difference across a parallel-plate capacitor whose plates are separated by a distance of 4.0 mm where each plate has a charge density of magnitude 5.0 pC/m^2? a. 1.02 millivolts b. 1.43 millivolts c. 2.26 millivolts d. 3.34 millivolts e. 4.43 millivolts