A large flat metal surface has uniform charge density . An electron of mass m and charge e leaves the surface at an angle at point A with speed v, and return to it at point B. The maximum value of AB is
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Answer:
Field near metal surface E=
ϵ
o
σ
Force on electron =eE=
ϵ
o
eσ
Acceleration of electron =a=
mϵ
o
eσ
Max Range =
a
v
2
=
eσ
v
2
mϵ
o
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