If the equation of sinusoidal current is 141.4 sin(314t). Find the RMS value and frequency of the current.

Correct option is B

​$$i = 141.4 \sin (314t) \\i = I_m \sin (\omega t) \\\frac{I_m}{\sqrt{2}} = \frac{141.4}{1.414} \\I_{\text{rms}} = 100 \text{ A} \\\omega = 2\pi f \\f = \frac{\omega}{2\pi} = \frac{314}{2 \times 3.14} \\f = 50 \text{ Hz}$$​​