Determine the electric field strength vector if the potential of this field depends on $x, y$ coordinates as $V = 10axy$.

  • A
    $10a(y \hat{i} + x \hat{j})$
  • B
    $-10a(y \hat{i} + x \hat{j})$
  • C
    $-a(y \hat{i} + x \hat{j})$
  • D
    $-10a(x \hat{i} + y \hat{k})$

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