Author Question: A point charge (-5.0 mC) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 mC) is ... (Read 99 times)

humphriesbr@me.com · **on:** Jul 28, 2018

A point charge (-5.0 mC) is placed on the x axis at x = 4.0 cm, and a second charge (+5.0 mC) is placed on the x axis at x = -4.0 cm. What is the magnitude of the electric force on a third charge (+2.5 mC) placed on the y axis at y = 3.0 cm?
a. 90 N
b. 45 N
c. 54 N
d. 72 N
e. 36 N

Question 2

Identical point charges Q are placed at each of the four corners of a 3.0 m 4.0 m rectangle. If Q = 40 mC, what is the magnitude of the electrostatic force on any one of the charges?
a. 3.0 N
b. 2.4 N
c. 1.8 N
d. 3.7 N
e. 2.0 N