The current flowing through an $AC$ circuit is given by $I = 5 \sin(120 \pi t) \text{ A}$. How long will the current take to reach the peak value starting from zero?

  • A
    $\frac{1}{60} \text{ s}$
  • B
    $60 \text{ s}$
  • C
    $\frac{1}{120} \text{ s}$
  • D
    $\frac{1}{240} \text{ s}$

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