Question

Assertion $\left(A\right)$: Power loss in an ideal choke coil will be zero.

Reason $\left(R\right)$: Ideal choke coil has zero power factor.

• A. Both $\left(A\right)$ and $\left(R\right)$ are true, and $\left(R\right)$ is the correct explanation of $\left(A\right)$
• B. Both $\left(A\right)$ and $\left(R\right)$ are true, and $\left(R\right)$ is not the correct explanation of $\left(A\right)$
• C. $\left(A\right)$ is true but $\left(R\right)$ is false
• D. $\left(A\right)$ is false but $\left(R\right)$ is true

Answer 1

The correct option is A Both $\left(A\right)$ and $\left(R\right)$ are true, and $\left(R\right)$ is the correct explanation of $\left(A\right)$

For an ideal choke coil, $R=0$

Average power dissipated in an a.c. circuit is,

$P_{avg}=V_{\text{rms}}\times I_{\text{rms}}\cos \varphi$

Where, $\cos \varphi =\text{Power factor}$ and

$\cos \left(\varphi \right)=\frac{R}{Z}=0[\because R=0]$

$P_{avg}=V_{\text{rms}}\times I_{\text{rms}}\cos \varphi =0$

<!--td {border: 1px solid #ccc;}br {mso-data-placement:same-cell;}--> Hence, $\left(A\right)$ is the correct answer.