Q.
Two charges q and – 3q are fixed on x-axis separated by distance d. Where should a third charge 2q be placed from A such that it will not experience any force?
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a
d-3d2
b
d+3d2
c
d+3d2
d
d-3d2
answer is B.
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Detailed Solution
From A distance is x from B it is d+x.qx2=3qd+x2 d+xx=3 solving x=d23+1
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