Practice!

Sample Problem

What is the voltage of C1 in the circuit above? V.

Solution

V =

C2 + 3 = 2.00F + 2.00F = 4.00 F

 =  +

 =  +  =

 = 2.00F

Qtotal = CV = 2.00F × 80.0V = 160.C

C1 is in series with the battery, so Q1 = Qtotal = 160.C

V =  =  = 40.0 V