A 50-C Charge Is 10 M from a Small Test Charge

A 5.0-C charge is 10 m from a small test charge. What is the magnitude of the force experienced by a 1.0 nC charge placed at the location of the test charge?

A) 0.045 N
B) 0.45 N
C) 4.5 N
D) 45 N
E) 450 N