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The electric potential V is givne as a f...

The electric potential `V` is givne as a function of distance `x` (metre) by `V = (5 x^(2) + 10x - 9)` volt. Value of electric field at `x = 1 `is

A

20 V/m

B

6 V/m

C

11 V/m

D

`-23` V/m

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