What is the $r.m.s.$ value of the current $i = t^2$ for the time interval $0 < t < T$?

  • A
    $\frac{T^2}{\sqrt{2}}$
  • B
    $\frac{T^2}{2}$
  • C
    $\frac{T^2}{\sqrt{5}}$
  • D
    None of these

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