The peak value of an alternating e.m.f. $E$ given by $E = E_0 \cos \omega t$ is $10 \ V$ and its frequency is $50 \ Hz$. At time $t = \frac{1}{600} \ s$,the instantaneous e.m.f. is:

  • A
    $10 \ V$
  • B
    $5\sqrt{3} \ V$
  • C
    $5 \ V$
  • D
    $1 \ V$

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