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A point charge $2 \times 10^{-2} \mathrm{C}$ is moved from $\mathrm{P}$ to $\mathrm{S}$ in a uniform electric field of $30 \mathrm{NC}^{-1}$ directed along positive $x-axis$ . If coordinates of $P$ and $S$ are $(1,2,0) \mathrm{m}$ and $(0,0,0) \mathrm{m}$ respectively, the work done by electric field will be
Option: 1
$1200 \mathrm{~mJ}$

Option: 2
$-1200 \mathrm{~mJ}$

Option: 3
$-600 \mathrm{~mJ}$

Option: 4
$600 \mathrm{~mJ}$

Answers (1)

best_answer

$\begin{aligned} & W_E=q \vec{E} \cdot \vec{S}=2 \times 10^{-2} \times(-30) \\ & =-0.6 \mathrm{~J}=-600 \mathrm{~mJ} \end{aligned}$

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