If the rms current in a $50 \text{ Hz}$ $AC$ circuit is $5 \text{ A}$,and at time $t=0$,the current $I$ is $0$. The value of current $I$ at $t=\frac{1}{300} \text{ s}$ is . . . . . . $A$.

  • A
    $\frac{5}{6}$
  • B
    $5 \sqrt{\frac{3}{2}}$
  • C
    $5 \sqrt{2}$
  • D
    $\frac{5}{\sqrt{2}}$

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