155268 An alternating emf source with a certain emf amplitude is connected in turn, to a resistor, a capacitor and then an inductor. Once connected to one of the elements, the source frequency $f_{\mathrm{s}}$ is varied and the amplitude $l$ of the resulting current through the element is measured and plotted, as shown in the figure. Which of the following gives the identification of the respective curves?

155269 In a series $L-C-R$ circuit the voltages across resistance, capacitance and inductance are 20 $\mathrm{V}$ each. If the capacitance is short-circuited, the voltage across the inductance will be

155270 A series RLC circuit, driven with $E_{\text {rms }}=120 \mathrm{~V}$ at frequency $50 \mathrm{~Hz}$, contains an inductance with $X_{L}=100 \Omega$, a capacitance with $X_{C}=110 \Omega$, and an unknown resistance $R$. For what value of $R$, the power factor is 0.9 ?

155271 A charged capacitor $C=30 \mu F$ is connected to an inductor $L=27 \mathrm{mH}$. The angular frequency of their oscillations is

155268 An alternating emf source with a certain emf amplitude is connected in turn, to a resistor, a capacitor and then an inductor. Once connected to one of the elements, the source frequency $f_{\mathrm{s}}$ is varied and the amplitude $l$ of the resulting current through the element is measured and plotted, as shown in the figure. Which of the following gives the identification of the respective curves?

155269 In a series $L-C-R$ circuit the voltages across resistance, capacitance and inductance are 20 $\mathrm{V}$ each. If the capacitance is short-circuited, the voltage across the inductance will be

155270 A series RLC circuit, driven with $E_{\text {rms }}=120 \mathrm{~V}$ at frequency $50 \mathrm{~Hz}$, contains an inductance with $X_{L}=100 \Omega$, a capacitance with $X_{C}=110 \Omega$, and an unknown resistance $R$. For what value of $R$, the power factor is 0.9 ?

155271 A charged capacitor $C=30 \mu F$ is connected to an inductor $L=27 \mathrm{mH}$. The angular frequency of their oscillations is

155268 An alternating emf source with a certain emf amplitude is connected in turn, to a resistor, a capacitor and then an inductor. Once connected to one of the elements, the source frequency $f_{\mathrm{s}}$ is varied and the amplitude $l$ of the resulting current through the element is measured and plotted, as shown in the figure. Which of the following gives the identification of the respective curves?

155269 In a series $L-C-R$ circuit the voltages across resistance, capacitance and inductance are 20 $\mathrm{V}$ each. If the capacitance is short-circuited, the voltage across the inductance will be

155270 A series RLC circuit, driven with $E_{\text {rms }}=120 \mathrm{~V}$ at frequency $50 \mathrm{~Hz}$, contains an inductance with $X_{L}=100 \Omega$, a capacitance with $X_{C}=110 \Omega$, and an unknown resistance $R$. For what value of $R$, the power factor is 0.9 ?

155271 A charged capacitor $C=30 \mu F$ is connected to an inductor $L=27 \mathrm{mH}$. The angular frequency of their oscillations is

155268 An alternating emf source with a certain emf amplitude is connected in turn, to a resistor, a capacitor and then an inductor. Once connected to one of the elements, the source frequency $f_{\mathrm{s}}$ is varied and the amplitude $l$ of the resulting current through the element is measured and plotted, as shown in the figure. Which of the following gives the identification of the respective curves?

155269 In a series $L-C-R$ circuit the voltages across resistance, capacitance and inductance are 20 $\mathrm{V}$ each. If the capacitance is short-circuited, the voltage across the inductance will be

155270 A series RLC circuit, driven with $E_{\text {rms }}=120 \mathrm{~V}$ at frequency $50 \mathrm{~Hz}$, contains an inductance with $X_{L}=100 \Omega$, a capacitance with $X_{C}=110 \Omega$, and an unknown resistance $R$. For what value of $R$, the power factor is 0.9 ?

155271 A charged capacitor $C=30 \mu F$ is connected to an inductor $L=27 \mathrm{mH}$. The angular frequency of their oscillations is