As Shown in the Figure,three Charges Are at Corners of a Rectangle.The

question 20

Multiple Choice

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 exerted on Q by 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

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