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Determine the electric field strength vector if the potential of this field depends on $x, y$ coordinates as $V=10$ axy
  • A$10 a(y \hat{i}+x \hat{j})$
  • B$-10 a[y \hat{i}+x \hat{j}]$
  • C$-a[y \hat{i}+x \hat{j}]$
  • D$-10 a[x \hat{i}+y \hat{k}]$
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