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A point mass m and charge q is connected...

A point mass m and charge q is connected with massless spring of natural length L. Initially spring is in its natural length. If a horizontal uniform electric field E is switched on as shown in figure, then the maximum separation between the point mass and the wall is: (Assume all surface are frictionless)

A

`L +(2qE)/(K)`

B

`L+(qE)/(K)`

C

L

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
A
`(1)/(2)Kx^(2) = (qE)x`
`x = (2qE)/(K)`
`:. x_(max) = L +(2qE)/(K)`
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