Three Point Charges,two Positive and One Negative,each Having a Magnitude $\mu$

question 145

Multiple Choice

Three point charges,two positive and one negative,each having a magnitude of 20 $\mu$ C are placed at the vertices of an equilateral triangle (30 cm on a side) .What is the magnitude of the electrostatic force on the negative charge?

• A)80 N
• B)40 N
• C)69 N
• D)57 N
• E)75 N

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