Let B be the midpoint of AC. Two point charges Q are placed at A and – McqOptions

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1.	Let B be the midpoint of AC. Two point charges Q are placed at A and C. What should be the value of charge placed at B so that the system remains at equilibrium?
A.	–Q/2
B.	–Q/4
C.	+Q/2
D.	+Q/4
Answer» C. +Q/2

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