Author Question: A 25-mF capacitor charged to 50 V and a capacitor C charged to 20 V are connected to each other, ... (Read 63 times)

ericka1 · **on:** Jul 28, 2018

A 25-mF capacitor charged to 50 V and a capacitor C charged to 20 V are connected to each other, with the two positive plates connected and the two negative plates connected. The final potential difference across the 25-mF capacitor is 36 V. What is the value of the capacitance of C?
a. 43 mF
b. 29 mF
c. 22 mF
d. 58 mF
e. 63 mF

Question 2

A 3.0-mF capacitor charged to 40 V and a 5.0-mF capacitor charged to 18 V 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 3.0-mF capacitor?
a. 11 mC
b. 15 mC
c. 19 mC
d. 26 mC
e. 79 mC