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In a certain region of space, variation ...

In a certain region of space, variation of potential with distance from origin as we move along x-axis is given by `V = 8 x^(2) + 2`, where x is the x-coordinate of a point in space. The magnitude of electric field at a point ( -4,0) is

A

` - 16 ` V/m

B

16 V/m

C

` -64` V/m

D

64 V/m

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The correct Answer is:
D
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