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For the circuit show in the figure, the instantaneous current $i_{i}(t)$ is

  1. $\frac{10 \sqrt{3}}{2} \angle 90^{\circ} \mathrm{Amps}$.
  2. $\frac{10 \sqrt{3}}{2} \angle-90^{\circ}$ Amps.
  3. $5 \angle 60^{\circ}$ Amps.
  4. $5 \angle-60^{\circ}$ Amps.
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