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Two identical particles of charge q each...

Two identical particles 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 unstretched .If maximum extension of the spring is `r`,the value of `k` is :(neglect gravitational effect)

A

`k=q/rsqrt(1/(pi epsilon_(0)r))`

B

`k=1/(4 pi epsilon_(0)) (q^(2))/(l^(2))xx1/r`

C

`k=(2q)/r sqrt(1/(piepsilon_(0)r))`

D

`k=q/rsqrt(2/(pi epsilon_(0)r))`

Text Solution

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The correct Answer is:
B
`F_(C)=kx`
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