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Two identical particles of mass m carry a charge `Q`, each. Initially one is at rest on a smooth horizontal plane and the other is projected along the plane directly towards first particle from a large distance with speed v. The closest distance of approach be .

A

`(1)/(4pi in_(0))(Q^(2))/(mv)`

B

`(1)/(4pi in_(0))(4Q^(2))/(mv^(2))`

C

`(1)/(4pi in_(0))(2Q^(2))/(mv^(2))`

D

`(1)/(4pi in_(0))(3Q^(2))/(mv^(2))`

Text Solution

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The correct Answer is:
B
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