Author Question: Identical point charges (+50 mC) are placed at the corners of a square with sides of 2.0-m length. ... (Read 123 times)

CharlieWard · **on:** Jul 28, 2018

Identical point charges (+50 mC) are placed at the corners of a square with sides of 2.0-m length. How much external energy is required to bring a fifth identical charge from infinity to the geometric center of the square?
a. 41 J
b. 16 J
c. 64 J
d. 10 J
e. 80 J

Question 2

Four identical point charges (+4.0 mC) are placed at the corners of a square which has 20-cm sides. How much work is required to assemble this charge arrangement starting with each of the charges a very large distance from any of the other charges?
a. +2.9 J
b. +3.9 J
c. +2.2 J
d. +4.3 J
e. +1.9 J