Multiple choice

For the circuit in the figure, the instantaneous current i1 (t) is

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