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Q.A charge qq is placed at the centre of the line joining two equal charges QQ. The system of three charges will be in equilibrium if qq is equal to (NEET 2017)

a
+Q/2+Q/2
b
−Q/2-Q/2
c
+Q/4+Q/4
d
−Q/4-Q/4

Correct Answer: Option D

The correct solution involves applying the fundamental concept to derive the final value step by step...

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