Question

An $AC$ circuit consists of a $220\Omega$ resistance and a $0.7\text{H}$ choke. Find the power absorbed from $220\text{V}$ and $50\text{Hz}$ source connected in this circuit if the resistance and choke are joined in parallel.

• A. $110\text{W}$
• B. $220\text{W}$
• C. $300\text{W}$
• D. None of the above

Answer 1

The correct option is B $220\text{W}$

When the resistance and choke are connected in parallel, the entire power is absorbed in resistance, as the choke (having zero resistance) absorb no power.

$\therefore P=\frac{V_{rms}^2}{R}=\frac{(220{)}^2}{220}=220\text{W}$

Hence, $\left(B\right)$ is the correct answer.