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

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(C) The inductive reactance of a coil is given by the formula $X_L = \omega L = 2\pi f L$,where $f$ is the frequency of the source.For an $A.C.$ sourc

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$\infty$

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(C) The inductive reactance of a coil is given by the formula $X_L = \omega L = 2\pi f L$,where $f$ is the frequency of the source.For an $A.C.$ source,the frequency $f$ is non-zero,so the reactance $X_{AC} = 2\pi f L$.For a $D.C.$ source,the frequency $f = 0$,so the reactance $X_{DC} = 2\pi (0) L = 0$.The ratio of the reactance when connected to an $A.C.$ source to that when connected to a $D.C.$ source is $\frac{X_{AC}}{X_{DC}} = \frac{2\pi f L}{0} = \infty$.Therefore,the ratio is $\infty$.

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

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