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A charged particle q is shot from a larg...

A charged particle q is shot from a large distance towards another charged particle Q which is fixed, with speed v. It approaches Q up to as closed distance r and then returns. If q were given a speed 2v, the distasnce of approach would be

A

r

B

2r

C

`(r )/(2)`

D

`(r )/(4)`

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