As shown in the figure,three charges are at corners of a rectangle.The charge in the bottom right corner is Q = - 90 nC,and all the other quantities are accurate to two significant figures.What is the magnitude of the net electrical force on Q due to the other two charges? (k = 1/4πε0 = 9.0 × 109 N ∙ m2/C2)
A) 3.8 × 10-2 N
B) 2.8 × 10-2 N
C) 5.3 × 10-2 N
D) 7.1 × 10-2 N
Correct Answer:
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