Q114 / 125 · BITSAT 2009 · Physics

The instantaneous current from an a.c. source is $\mathrm{I}=6 \sin 314 \mathrm{t}$. What is the rms value of the current?

  • Correct answer
    A
    $3 \sqrt{2} \mathrm{amp}$
  • B
    $2 \sqrt{2}$ amp
  • C
    $\sqrt{2} \mathrm{amp}$
  • D
    $2 \mathrm{amp}$

Solution

$\mathrm{I}_{\mathrm{rms}}=\frac{\mathrm{I}_{0}}{\sqrt{2}}=\frac{6}{\sqrt{2}}=3 \sqrt{2} \mathrm{amp} .$

Hence, the correct answer is option: 'A'.

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