$A$ sinusoidal $AC$ current flows through a resistor of resistance $R$. If the peak current is $I_p$,then the power dissipated is

  • A
    $I_p^2R \cos \theta$
  • B
    $\frac{1}{2}I_p^2R$
  • C
    $\frac{4}{\pi}I_p^2R$
  • D
    $\frac{1}{\pi}I_p^2R$

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