Charges 4Q, q and Q and placed along x-axis at positions \[x=0,x=l/2\] – McqOptions

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1.	Charges 4Q, q and Q and placed along x-axis at positions \[x=0,x=l/2\] and \[x=l\], respectively. Find the value of q so that force on charge Q is zero [DPMT 2005]
A.	Q
B.	Q / 2
C.	? Q / 2
D.	? Q
Answer» E.

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