The effective value of current $i = 2\, sin\, 100\, \pi\, t + 2 \,sin(100\, \pi \,t + 30^o)$ is :

  • A

    $\sqrt 2 A$

  • B

    $2\,\sqrt {2 + \sqrt 3 } $

  • C

    $4$

  • D

    None

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