InterviewSolution
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InterviewSolution
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A charged particle of mass `m` and charge `q` is released from rest in an electric field of constant magnitude `E`. The kinetic energy of the particle after time `t` isA. `(2 E^(2) t^(2))/(mq)`B. `(Et^(2) m)/(2t^(2))`C. `(E^(2) q^(2) t^(2))/(2m)`D. `(E q m)/(2t)` |
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Answer» Correct Answer - 3 `a = (F)/(m) = (qE)/(m)` `v = u + at = 0 + (qEt)/(m)` `K = (1)/(2) mv^(2) = (1)/(2) m((qEt)/(m))^(2) = (q^(2) E^(2) t^(2))/(2m)` |
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