Question 348: AC fundamentals

Question

$\mathrm{L}=2 \mathrm{H}, \mathrm{C}=5 \mathrm{mF}$ and $\mathrm{R}=12 \Omega$ are connected in series to an a.c. generator of frequency 50 Hz . Then

Accepted Answer

Impedance, $\mathrm{Z}=\sqrt{\mathrm{R}^2+\left(\mathrm{X}_{\mathrm{L}}-\mathrm{X}_{\mathrm{C}}ight)^2}$
At resonance
$$\begin{array}{ll} 
& \mathrm{X}_{\mathrm{L}}=\mathrm{X}_{\mathrm{C}} \
	herefore \quad & \mathrm{Z}=\mathrm{R} \
	herefore \quad & \mathrm{Z}=12 \Omega
\end{array}$$

Answer

at resonance, impedance of the circuit is zero.

Answer

at resonance, impedance of the circuit is $12 \Omega$.

Answer

the resonant frequency of the circuit is $1 / 2 \pi$.

Answer

the inductive reactance is less than the capacitive reactance.

AC fundamentals

\mathrm{L}=2 \mathrm{H}, \mathrm{C}=5 \mathrm{mF} and \mathrm{R}=12 \Omega are connected in series to an a.c. generator of frequency 50 Hz . Then

Choose the correct answer: