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Q.

A particle A of mass m and charge Q moves directly towards a fixed particle B, which has charge Q. The speed of A is v when it is far away from B. The minimum separation between the particles is proportional to

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a

Q

b

1v2

c

1v

d

1m2

answer is B.

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Detailed Solution

By conservation of energy, 12mv2=k.Q2xmin xmin=k.2Q2mv2Where xmin= minimum separation.
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