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A very small but irregularly-shaped plastic object has a net charge of $+Q$. An uncharged metallic cube sits $50\text{ cm}$ to the right of the plastic object. Point $P$ is another $150\text{ cm}$ to the right of the metallic cube.

What is the approximate electric field at point $P$ because of the plastic object?

A

$4kQ$

B

$\frac{1}{2}kQ$

C

$\frac{1}{4}kQ$

D

$\frac{1}{9}kQ$

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