Author Question: The electric field strength in the space between two closely spaced parallel disks is 1.0 105 N/C. ... (Read 40 times)

audragclark · **on:** Jul 29, 2018

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