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  • A particle of mass and charge  is placed at rest

A particle of mass m and charge q is placed at rest in a uniform electric field E and then released, the kinetic energy attained by the particle after moving a distance y, will be -

Option: 1

q^{2}Ey


Option: 2

qEy


Option: 3

qE^{2}y


Option: 4

qEy^{2}


Answers (1)

best_answer

we know that the kinetic energy change is equal to work done.
\begin{aligned} \omega & =\Delta K \cdot E . \\ \Delta K \cdot E & =F \times \text { displacement } \\ & =q E \times y \\ \Delta K \cdot E \cdot & =q E y \quad \text { } \end{aligned}

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avinash.dongre

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