The electric potential $(V)$ as a function of distance $(x)$ [in meters] is given by $V = (5x^2 + 10 x -9)\, Volt$. The value of electric field at $x = 1\, m$ would be......$Volt/m$

  • A

    $20$

  • B

    $6$

  • C

    $11$

  • D

    $-23$

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