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A large flat metal surface has a uniform...

A large flat metal surface has a uniform charge density (`+sigma`). An electron of mass m and charge `rho` leaves the surface at the point A with speed u and returns to it at point B. Disregarding gravity the maximum value of AB is

A

`(4u^(2)mepsilon_(0))/(sigmarho)`

B

`(u^(2).rhoepsilon_(0))/(msigma)`

C

`(2epsilon_(0)m u^(2))/(rhosigma)`

D

`(u^(2)sigmarho)/(epsilon.m)`

Text Solution

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The correct Answer is:
C
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