Question 316: AC fundamentals

Question

When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit

Accepted Answer

Impedance in LR circuit,
$$\mathrm{Z}=\sqrt{\mathrm{R}^2+\mathrm{X}_{\mathrm{L}}{ }^2}$$
Impedance in LCR circuit,
$$\mathrm{Z}=\sqrt{\mathrm{R}^2+\left(\mathrm{X}_{\mathrm{L}}-\mathrm{X}_{\mathrm{C}}ight)^2}$$
$	herefore \quad$ When capacitor is connected in series, Z decreases.
$$I=\frac{V}{Z} \Rightarrow I \propto \frac{1}{Z}$$
$	herefore \quad$ When $Z$ decreases, $I$ increases.

Answer

is zero.

Answer

remains constant.

Answer

increases.

Answer

decreases.

AC fundamentals

When a capacitor is connected in series LR circuit, the alternating current flowing in the circuit

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