Author Question: Two charges lie on the x axis, +3q at the origin, and -2q at x = 5.0 m. The point on the x axis ... (Read 301 times)

ereecah · **on:** Jul 28, 2018

Two charges lie on the x axis, +3q at the origin, and -2q at x = 5.0 m. The point on the x axis where the electric potential has a zero value (when the value at infinity is also zero) is
a. 1.0 m.
b. 2.0 m.
c. 2.5 m.
d. 3.0 m.
e. 4.0 m.

Question 2

Identical point charges (+30 mC) are placed at the corners of a rectangle (4.0 m 6.0 m). How much external energy is required to bring a charge of 55 mC from infinity to the midpoint of one of the 6.0-m long sides of the rectangle?
a. 22 J
b. 16 J
c. 13 J
d. 19 J
e. 8.0 J