The electric field strength in the space between two closely ...

[audragclark]

The electric field strength in the space between two closely spaced parallel disks is 1.0  105 N/C. This field is the result of transferring 3.9  109 electrons from one disk to the other.
 
  What is the diameter of the disks? (e = 1.60  10-19 C, 0 = 8.85  10-12 C2/N  m2)
  A) 3.0 cm
  B) 1.5 cm
  C) 4.5 cm
  D) 6.0 cm

Question 2

A charge of 2.00 C flows onto the plates of a capacitor when it is connected to a 12.0-V potential source. What is the minimum amount of work that must be done in charging this capacitor?
 
  A) 6.00 J
  B) 24.0 J
  C) 12.0 J
  D) 144 J
  E) 576 J

[polinasid]

Answer to Question 1

A

Answer to Question 2

C

[audragclark]

Excellent

[strudel15]

TYSM