A parallel plate capacitor of capacitance C0 has plates of area A ...

[Haya94]

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. It is then disconnected from the battery and the plates are pulled apart to a separation 2d without discharging them. After the plates are 2d apart, the magnitude of the charge on the plates and the potential difference between them are what?
   
  a.
  Q₀, V₀
   
  b.
  Q₀, V₀
   
  c.
  Q₀, V₀
   
  d.
  Q₀, 2V₀
   
  e.
  2Q₀, 2V₀

Question 2

If V_A  V_B = 50 V, how much energy is stored in the 54-F capacitor?
 
   

   
  a.
  50 mJ
   
  b.
  13 mJ
   
  c.
  28 mJ
   
  d.
  8.9 mJ
   
  e.
  17 mJ

[braelync]

Answer to Question 1

d

Answer to Question 2

b

[Haya94]

Wow, this really help

[kthug]

Excellent