In an isolated battery (not connected to an electrical circuit), ...

[skymedlock]

In an isolated battery (not connected to an electrical circuit),
 
  A) there are excess electrons on the positive terminal but no excess of protons on the negative terminal.
  B) there is no excess of electrons or protons on either terminal.
  C) there are excess protons on the negative terminal and excess electrons on the positive terminal.
  D) there are excess electrons on the negative terminal and excess protons on the positive terminal.
  E) there are excess electrons on the negative terminal but no excess protons on the positive terminal.

Question 2

An air-filled capacitor is formed from two long conducting cylindrical shells that are coaxial and have radii of 13 mm and 85 mm.
 
  The electric potential of the inner conductor with respect to the outer conductor is -600 V. (k = 1/40 = 8.99  109 N  m2/C2 ) The maximum energy density of the capacitor is closest to
  A) 2.7  10-3 J/m3.
  B) 1.3  10-3 J/m3.
  C) 6.7  10-4 J/m3.
  D) 3.4  10-3 J/m3.
  E) 1.7  10-4 J/m3.

[maya.nigrin17@yahoo.com]

Answer to Question 1

D

Answer to Question 2

A