(a) Consider capacitors and inductors. One of these devices increases in impeden
ID: 1473021 • Letter: #
Question
(a) Consider capacitors and inductors. One of these devices increases in impedence as the driving frequency is increased. Which is it and why does it have this behavior (i.e. what physical principle explains this) ?
(b) Consider capacitors and inductors again. One of these devices behaves such that the voltage across it lags (in time) the current through it. Which is it and why does it have this behavior (i.e. what physical principle explains this) ?
Please make sure you answer the part in bold.
Explanation / Answer
The driving frequency and the reactance offered by inductance are directly proportional to each other and the reactance is offered by the capacitor is inversely proportional to each other, thus, if the frequency increases, inductor causes increase in impedance.
In capacitor, the voltage across it lags the current, this is due to the fact that the capacitor has capability of storing energy
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