Question 320: AC fundamentals

Question

With gradual increase in frequency of an a.c. supply, the impedance of an LCR series circuit

Accepted Answer

We know
$$\mathrm{X}_{\mathrm{L}}=\mathrm{L} \omega 	ext { and } \mathrm{X}_{\mathrm{C}}=\frac{1}{\mathrm{C} \omega}$$
$\Rightarrow$ When the frequency increases, $\mathrm{X}_{\mathrm{L}}$ increases and $\mathrm{X}_{\mathrm{c}}$ decreases.
$	herefore \quad$ The impedance of an LCR series circuit decreases at first, becomes minimum and then increases.

Answer

increases.

Answer

decreases.

Answer

remains constant

Answer

first decreases, becomes minimum and then increases.

AC fundamentals

With gradual increase in frequency of an a.c. supply, the impedance of an LCR series circuit

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