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A particle of mass m and charge q is released from rest in uniform electric field of intensity E. Calculate the kinetic energy it attains afect moving a distance x between the plates. |
Answer» Correct Answer - qEx As `F = qE` `a = (F)/(m) = (qE)/(m)` As `v^(2) - u^(2) = 2` as, and `u = 0 :. V^(2) = 2as` `implies v^(2) = 2 ((qE)/(m))x xx = (2qEx)/(m)` `K.E. = (1)/(2) mv^(2) = (1)/(2) m ((2q Ex)/(m)) = qEx` |
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