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Q.

A charge q1 exerts some force on a second charge q2. If third charge q3 is brought  near, the force of q1 exerted on q2

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a

Decreases

b

Increases

c

Remains unchanged

d

Increases if q3 is of the same sign as  q1 and decreases if  q3 is of opposite sign.

answer is C.

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Detailed Solution

The force will still remain q1q24πε0r2
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