A coil has an inductance of 2 H. The ratio o | vedclass

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(D) The inductive reactance of a coil in an $AC$ circuit is given by $X_L = \omega L = 2 \pi f L$,where $f$ is the frequency of the $AC$ source.For an

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Infinity

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(D) The inductive reactance of a coil in an $AC$ circuit is given by $X_L = \omega L = 2 \pi f L$,where $f$ is the frequency of the $AC$ source.For an $AC$ source,the frequency $f > 0$,so the reactance $X_L$ has a finite non-zero value.For a $DC$ source,the frequency $f = 0$. Therefore,the inductive reactance $X_L = 2 \pi (0) L = 0 \ \Omega$.The ratio of the reactance in $AC$ to the reactance in $DC$ is $\frac{X_L(AC)}{X_L(DC)} = \frac{\omega L}{0} = \infty$.Thus,the ratio is infinity.

$A$ coil has an inductance of $2 \ H$. The ratio of its reactance,when it is connected first to an $AC$ source and then to a $DC$ source,is

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