Exam 26: Capacitance and Dielectrics

A 3.0-μF capacitor charged to 40 V and a 5.0-μF 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-μF capacitor?

Determine the equivalent capacitance of the combination shown when C = 15 mF.

A parallel plate capacitor of capacitance C₀ has plates of area A with separation d between them.When it is connected to a battery of voltage V₀,it has charge of magnitude Q₀ on its plates.The plates are pulled apart to a separation 2d while the capacitor remains connected to the battery.After the plates are 2d apart,the capacitance of the capacitor and the magnitude of the charge on the plates are