In an $A.C.$ circuit, $I_{\text {rms }}$ and $I_{0}$ are related as

  • [AIPMT 1994]
  • A

    $I _{ rms }=\frac{1}{\pi} I _{0}$

  • B

    $I _{ rms }=\frac{1}{\sqrt{2}} I _{0}$

  • C

    $I _{ rms }=\sqrt{2} I _{0}$

  • D

    $I _{ rms }=\pi I _{0}$

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  • [JEE MAIN 2021]