Question

Rms value of current $i=3+4\sin \left(\omega t+\frac{\pi }{3}\right)$ is:

• A. $5A$
• B. $\sqrt{17}A$
• C. $\frac{5}{\sqrt{2}}A$
• D. $\frac{7}{\sqrt{2}}A$

Answer 1

The correct option is B $\sqrt{17}A$

the RMS value of DC of current 3A be 3A

RMS value of $4sin\{\omega t+\frac{\pi }{3}\}is\frac{4}{\sqrt{2}}$

is add net RMS value $I=\sqrt{9+\frac{16}{2}}=\sqrt{17}A$