An electron moves staright inside a char...

An electron moves staright inside a charged parallel plate capacitor of unifrom surface charge dencity `sigma`. The space between the plates is filled with constant magnetic field of induction `vecB`. The time of staright line motion of the electron in the capacitor is

`(e sigma)/(epsilon_(0) lB)`

`(epsilon_(0) l B)/(sigma)`

`(e sigma)/(epsilon_(0)B)`

`(epsilon_(0)B)/(e sigma)`

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