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Force on a Current Element

A 12v car b...

Question

A $12 v$ car battery is attached to two metal plates so that one is positively charged and the other is negatively charged.
At point $P$ some distance horizontally away, yet directly in between the two vertically on the screen, what is the direction of the electric field due to the plates?

A

⟶

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B

⟵

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C

↑

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D

↓

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Solution

The correct option is D $↓$

We know that field due to positive charge is away from it while due to negative charge is towards it.

From figure hence we see that the net electric field at point $P$ is downward $(↓)$ direction because of symmetry.

Hence answer-(D)

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