Question

In the given circuit, rms value of current $\left( I _{ rms }\right)$ through the resistor $R$ is:

• A. $\frac{1}{2} A$
• B. $20 A$
• C. $2 A$
• D. $2 \sqrt{2} A$

Answer 1

Answer: (C)

$z =\sqrt{100^2+(200-100)^2}$
$=100 \sqrt{2} \Omega$
$i _{ rms }=\frac{ V _{ rms }}{ z }=\frac{200 \sqrt{2}}{100 \sqrt{2}}$
$=2 A$