As Shown in the Figure, Three Charges Are at Corners

question 74

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 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

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