Terminals A and B in Figure 21-39 are connected to a 9.0-V

Step 1 of 6                

Three capacitors are connected together as shown in the diagram at the right, and a battery is connected across terminals A and B.

The voltage drop across , equals the battery emf, so we can find the energy stored by ,

by using equation

To find the energy stored by  and , we must first find the equivalent capacitance  of the two capacitors. Then use the battery emf, which is the voltage across , to find the charge  stored on both  and .

We can use the equation to find the energy stored in  and