What is the angle between the electric field vectors at points A and B because of an infinitely long line charge as shown?

30⁰

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zero

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90⁰

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can’t be determined

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Solution

The correct option is B
zero

The electric field due to an infinitely long line of charge has a direction perpendicular to the line of charge. This is because the parallel components from both sides at a point will be equal and cancel out (as it is an infinitely long line charge)

So the angle between the directions of the two electric fields would be zero

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