ElectrostaticsHard
Question
A charged particle of charge q and mass m is released from rest in a uniform electric field E. Neglecting the effect of gravity, the kinetic energy of the charged particle after time ′t′ seconds is
Options
A.
B.
C.
D.
Solution
Force on charge q in electric field E ⇒ F = qE ⇒ a = 
∴ Distance travelled ⇒ x =
at2 = 
Also, kinetic energy K.E = Work done by electric field E is WE = qE.
∴ Distance travelled ⇒ x =
at2 = Also, kinetic energy K.E = Work done by electric field E is WE = qE.
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