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Two particles (free to move) with charge...

Two particles (free to move) with charges `+q` and `+4q` are a distance L apart. A third charge is placed so that the entire system is in equilibrium.
(a) Find the location, magnitude and sign of the third charge.
(b) Show that the equilibrium is unstable.

Text Solution

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The correct Answer is:
`" A negative charge of "(4e)/(9)" at a distance of " (2l)/(3)" from +4e chagre"`
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