Two charges q1 and q2 are placed on the x-axis, with q1 at x = a, and – McqOptions

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1.	Two charges q1 and q2 are placed on the x-axis, with q1 at x = a, and q2 at x = 3a. A third charge Q is placed at the origin. The net force on charge Q is zero if q2 is equal to:
A.	3 q1
B.	-3 q1
C.	9 q1
D.	-9 q1
Answer» E.

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