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Two identical blocks of charge q each ar...

Two identical blocks of charge q each are connected by a massless spring of force constant `k`. They are placed over a smooth horizontal surface. They are released when the separation between them is r and spring is unstretched. If maximum extension of the spring is `r`, the value of `k` is (neglect gravitational effect)

A

`(q)/(4r)sqrt((1)/(pi epsilon_(0)r))`

B

`(q)/(2r)sqrt((1)/(pi epsilon_(0)r))`

C

`(2q)/(r)sqrt((1)/(pi epsilon_(0)r))`

D

`(q)/(r)sqrt((1)/(pi epsilon_(0)r))`

Text Solution

Verified by Experts

The correct Answer is:
B
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