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Q.

Two charges 2 μC and 1 μC are placed at a distance of 10 cm. The position of third charge from 2 C μ between them so that it does not experience any force

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a

5.858 cm

b

7 cm

c

8 cm

d

2 cm

answer is C.

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Detailed Solution

⇒k1×10−6q(10−x)2=2×10−6qx2⇒110−x=2x⇒x=102−x2⇒x(1+2)=102⇒x=1021+2⇒x=14.142.414⇒x=5.857cm

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