Author Question: A 15-mF capacitor is charged to 40 V and then connected across an initially uncharged 25-mF ... (Read 83 times)

Engineer · **on:** Jul 28, 2018

A 15-mF capacitor is charged to 40 V and then connected across an initially uncharged 25-mF capacitor. What is the final potential difference across the 25-mF capacitor?
a. 12 V
b. 18 V
c. 15 V
d. 21 V
e. 24 V

Question 2

A 20-mF capacitor charged to 2.0 kV and a 40-mF 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 20-mF capacitor after the two are so connected?
a. 53 mC
b. 27 mC
c. 40 mC
d. 80 mC
e. 39 mC