Question

r.m.s. value of current $i=3+4\sin (\omega t+\pi /3)$ is

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

Answer 1

Answer: (B)

$\sqrt{17}A$

For $i$ = $a$ + $bsin\left(wt\right)$ ;

the r.m.s value is given by

$i_{r.m.s}$ = $\sqrt{a^2+\frac{b^2}{2}}$.