155218
The ratio of the peak current through the capacitor and supply is known as-
1 resonance current
2 dynamic resistance
3 Q-factor
4 None of the above
Explanation:
C The ratio of the peak current through the capacitor and supply is known as Q-factor. $\mathrm{Q} \text { - factor }=\frac{\mathrm{V}_{0} \omega \mathrm{C}}{\frac{\mathrm{V}_{0} \mathrm{CR}}{\mathrm{L}}}=\frac{\omega \mathrm{L}}{\mathrm{R}}$
BCECE-2014
Alternating Current
155225
In a choke coil, the reactance $X_{L}$ and resistance $R$ are such that-
1 $X_{\mathrm{L}}=\mathrm{R}$
2 $X_{L}>>R$
3 $X_{L} \lt \lt R$
4 $X_{L}=\infty$
Explanation:
B To decrease current in a AC circuit choke coil is used. The choke coil has high inductance and negligible resistance so that the energy loss in circuit is negligible. So, $\mathrm{X}_{\mathrm{L}}>>\mathrm{R}$
BCECE-2008
Alternating Current
155238
The transmission of high frequencies in a coaxial cable is determined by
1 $\frac{1}{(\mathrm{LC})^{1 / 2}}$ where $\mathrm{L}$ and $\mathrm{C}$ are inductance and capacitance
2 $(\mathrm{LC})^{2}$
3 the impedance $\mathrm{L}$ alone
4 the dielectric and skin effect
Explanation:
D A co-axial cable consists of a conducting wire surrounded by a dielectric space, over which there is a sleeve of copper mesh covered with a shield of PVC insulation. The power transmission is regulated by dielectric. At high frequencies energy loss due to mesh is significant (called skin effect).
VITEEE-2007
Alternating Current
155253
The inductive reactance of an inductor in an A.C. circuit is
1 $\frac{1}{\omega \mathrm{L}}$
2 $\frac{\omega}{\mathrm{L}}$
3 $\frac{L}{\omega}$
4 $\omega \mathrm{L}$
Explanation:
D Inductive reactance is the opposition offered by the inductor in an $\mathrm{AC}$ circuit to the flow of $\mathrm{AC}$ current inductive reactance is represented by $\mathrm{X}_{\mathrm{L}}$ $\mathrm{X}_{\mathrm{L}}=\omega \mathrm{L}=2 \pi \mathrm{fL}$
J and K CET- 2002
Alternating Current
155257
In an LCR circuit, at resonance, the power dissipated across $L$ or $C$ is
1 The maximum
2 The minimum
3 Equals that across $\mathrm{R}$
4 Greater than that across $\mathrm{R}$
Explanation:
B In LCR circuit at resonance the power dissipated across $\mathrm{L}$ or $\mathrm{C}$ is minimum because Phase difference between current and voltage is $\phi=90^{\circ}$
155218
The ratio of the peak current through the capacitor and supply is known as-
1 resonance current
2 dynamic resistance
3 Q-factor
4 None of the above
Explanation:
C The ratio of the peak current through the capacitor and supply is known as Q-factor. $\mathrm{Q} \text { - factor }=\frac{\mathrm{V}_{0} \omega \mathrm{C}}{\frac{\mathrm{V}_{0} \mathrm{CR}}{\mathrm{L}}}=\frac{\omega \mathrm{L}}{\mathrm{R}}$
BCECE-2014
Alternating Current
155225
In a choke coil, the reactance $X_{L}$ and resistance $R$ are such that-
1 $X_{\mathrm{L}}=\mathrm{R}$
2 $X_{L}>>R$
3 $X_{L} \lt \lt R$
4 $X_{L}=\infty$
Explanation:
B To decrease current in a AC circuit choke coil is used. The choke coil has high inductance and negligible resistance so that the energy loss in circuit is negligible. So, $\mathrm{X}_{\mathrm{L}}>>\mathrm{R}$
BCECE-2008
Alternating Current
155238
The transmission of high frequencies in a coaxial cable is determined by
1 $\frac{1}{(\mathrm{LC})^{1 / 2}}$ where $\mathrm{L}$ and $\mathrm{C}$ are inductance and capacitance
2 $(\mathrm{LC})^{2}$
3 the impedance $\mathrm{L}$ alone
4 the dielectric and skin effect
Explanation:
D A co-axial cable consists of a conducting wire surrounded by a dielectric space, over which there is a sleeve of copper mesh covered with a shield of PVC insulation. The power transmission is regulated by dielectric. At high frequencies energy loss due to mesh is significant (called skin effect).
VITEEE-2007
Alternating Current
155253
The inductive reactance of an inductor in an A.C. circuit is
1 $\frac{1}{\omega \mathrm{L}}$
2 $\frac{\omega}{\mathrm{L}}$
3 $\frac{L}{\omega}$
4 $\omega \mathrm{L}$
Explanation:
D Inductive reactance is the opposition offered by the inductor in an $\mathrm{AC}$ circuit to the flow of $\mathrm{AC}$ current inductive reactance is represented by $\mathrm{X}_{\mathrm{L}}$ $\mathrm{X}_{\mathrm{L}}=\omega \mathrm{L}=2 \pi \mathrm{fL}$
J and K CET- 2002
Alternating Current
155257
In an LCR circuit, at resonance, the power dissipated across $L$ or $C$ is
1 The maximum
2 The minimum
3 Equals that across $\mathrm{R}$
4 Greater than that across $\mathrm{R}$
Explanation:
B In LCR circuit at resonance the power dissipated across $\mathrm{L}$ or $\mathrm{C}$ is minimum because Phase difference between current and voltage is $\phi=90^{\circ}$
155218
The ratio of the peak current through the capacitor and supply is known as-
1 resonance current
2 dynamic resistance
3 Q-factor
4 None of the above
Explanation:
C The ratio of the peak current through the capacitor and supply is known as Q-factor. $\mathrm{Q} \text { - factor }=\frac{\mathrm{V}_{0} \omega \mathrm{C}}{\frac{\mathrm{V}_{0} \mathrm{CR}}{\mathrm{L}}}=\frac{\omega \mathrm{L}}{\mathrm{R}}$
BCECE-2014
Alternating Current
155225
In a choke coil, the reactance $X_{L}$ and resistance $R$ are such that-
1 $X_{\mathrm{L}}=\mathrm{R}$
2 $X_{L}>>R$
3 $X_{L} \lt \lt R$
4 $X_{L}=\infty$
Explanation:
B To decrease current in a AC circuit choke coil is used. The choke coil has high inductance and negligible resistance so that the energy loss in circuit is negligible. So, $\mathrm{X}_{\mathrm{L}}>>\mathrm{R}$
BCECE-2008
Alternating Current
155238
The transmission of high frequencies in a coaxial cable is determined by
1 $\frac{1}{(\mathrm{LC})^{1 / 2}}$ where $\mathrm{L}$ and $\mathrm{C}$ are inductance and capacitance
2 $(\mathrm{LC})^{2}$
3 the impedance $\mathrm{L}$ alone
4 the dielectric and skin effect
Explanation:
D A co-axial cable consists of a conducting wire surrounded by a dielectric space, over which there is a sleeve of copper mesh covered with a shield of PVC insulation. The power transmission is regulated by dielectric. At high frequencies energy loss due to mesh is significant (called skin effect).
VITEEE-2007
Alternating Current
155253
The inductive reactance of an inductor in an A.C. circuit is
1 $\frac{1}{\omega \mathrm{L}}$
2 $\frac{\omega}{\mathrm{L}}$
3 $\frac{L}{\omega}$
4 $\omega \mathrm{L}$
Explanation:
D Inductive reactance is the opposition offered by the inductor in an $\mathrm{AC}$ circuit to the flow of $\mathrm{AC}$ current inductive reactance is represented by $\mathrm{X}_{\mathrm{L}}$ $\mathrm{X}_{\mathrm{L}}=\omega \mathrm{L}=2 \pi \mathrm{fL}$
J and K CET- 2002
Alternating Current
155257
In an LCR circuit, at resonance, the power dissipated across $L$ or $C$ is
1 The maximum
2 The minimum
3 Equals that across $\mathrm{R}$
4 Greater than that across $\mathrm{R}$
Explanation:
B In LCR circuit at resonance the power dissipated across $\mathrm{L}$ or $\mathrm{C}$ is minimum because Phase difference between current and voltage is $\phi=90^{\circ}$
155218
The ratio of the peak current through the capacitor and supply is known as-
1 resonance current
2 dynamic resistance
3 Q-factor
4 None of the above
Explanation:
C The ratio of the peak current through the capacitor and supply is known as Q-factor. $\mathrm{Q} \text { - factor }=\frac{\mathrm{V}_{0} \omega \mathrm{C}}{\frac{\mathrm{V}_{0} \mathrm{CR}}{\mathrm{L}}}=\frac{\omega \mathrm{L}}{\mathrm{R}}$
BCECE-2014
Alternating Current
155225
In a choke coil, the reactance $X_{L}$ and resistance $R$ are such that-
1 $X_{\mathrm{L}}=\mathrm{R}$
2 $X_{L}>>R$
3 $X_{L} \lt \lt R$
4 $X_{L}=\infty$
Explanation:
B To decrease current in a AC circuit choke coil is used. The choke coil has high inductance and negligible resistance so that the energy loss in circuit is negligible. So, $\mathrm{X}_{\mathrm{L}}>>\mathrm{R}$
BCECE-2008
Alternating Current
155238
The transmission of high frequencies in a coaxial cable is determined by
1 $\frac{1}{(\mathrm{LC})^{1 / 2}}$ where $\mathrm{L}$ and $\mathrm{C}$ are inductance and capacitance
2 $(\mathrm{LC})^{2}$
3 the impedance $\mathrm{L}$ alone
4 the dielectric and skin effect
Explanation:
D A co-axial cable consists of a conducting wire surrounded by a dielectric space, over which there is a sleeve of copper mesh covered with a shield of PVC insulation. The power transmission is regulated by dielectric. At high frequencies energy loss due to mesh is significant (called skin effect).
VITEEE-2007
Alternating Current
155253
The inductive reactance of an inductor in an A.C. circuit is
1 $\frac{1}{\omega \mathrm{L}}$
2 $\frac{\omega}{\mathrm{L}}$
3 $\frac{L}{\omega}$
4 $\omega \mathrm{L}$
Explanation:
D Inductive reactance is the opposition offered by the inductor in an $\mathrm{AC}$ circuit to the flow of $\mathrm{AC}$ current inductive reactance is represented by $\mathrm{X}_{\mathrm{L}}$ $\mathrm{X}_{\mathrm{L}}=\omega \mathrm{L}=2 \pi \mathrm{fL}$
J and K CET- 2002
Alternating Current
155257
In an LCR circuit, at resonance, the power dissipated across $L$ or $C$ is
1 The maximum
2 The minimum
3 Equals that across $\mathrm{R}$
4 Greater than that across $\mathrm{R}$
Explanation:
B In LCR circuit at resonance the power dissipated across $\mathrm{L}$ or $\mathrm{C}$ is minimum because Phase difference between current and voltage is $\phi=90^{\circ}$
155218
The ratio of the peak current through the capacitor and supply is known as-
1 resonance current
2 dynamic resistance
3 Q-factor
4 None of the above
Explanation:
C The ratio of the peak current through the capacitor and supply is known as Q-factor. $\mathrm{Q} \text { - factor }=\frac{\mathrm{V}_{0} \omega \mathrm{C}}{\frac{\mathrm{V}_{0} \mathrm{CR}}{\mathrm{L}}}=\frac{\omega \mathrm{L}}{\mathrm{R}}$
BCECE-2014
Alternating Current
155225
In a choke coil, the reactance $X_{L}$ and resistance $R$ are such that-
1 $X_{\mathrm{L}}=\mathrm{R}$
2 $X_{L}>>R$
3 $X_{L} \lt \lt R$
4 $X_{L}=\infty$
Explanation:
B To decrease current in a AC circuit choke coil is used. The choke coil has high inductance and negligible resistance so that the energy loss in circuit is negligible. So, $\mathrm{X}_{\mathrm{L}}>>\mathrm{R}$
BCECE-2008
Alternating Current
155238
The transmission of high frequencies in a coaxial cable is determined by
1 $\frac{1}{(\mathrm{LC})^{1 / 2}}$ where $\mathrm{L}$ and $\mathrm{C}$ are inductance and capacitance
2 $(\mathrm{LC})^{2}$
3 the impedance $\mathrm{L}$ alone
4 the dielectric and skin effect
Explanation:
D A co-axial cable consists of a conducting wire surrounded by a dielectric space, over which there is a sleeve of copper mesh covered with a shield of PVC insulation. The power transmission is regulated by dielectric. At high frequencies energy loss due to mesh is significant (called skin effect).
VITEEE-2007
Alternating Current
155253
The inductive reactance of an inductor in an A.C. circuit is
1 $\frac{1}{\omega \mathrm{L}}$
2 $\frac{\omega}{\mathrm{L}}$
3 $\frac{L}{\omega}$
4 $\omega \mathrm{L}$
Explanation:
D Inductive reactance is the opposition offered by the inductor in an $\mathrm{AC}$ circuit to the flow of $\mathrm{AC}$ current inductive reactance is represented by $\mathrm{X}_{\mathrm{L}}$ $\mathrm{X}_{\mathrm{L}}=\omega \mathrm{L}=2 \pi \mathrm{fL}$
J and K CET- 2002
Alternating Current
155257
In an LCR circuit, at resonance, the power dissipated across $L$ or $C$ is
1 The maximum
2 The minimum
3 Equals that across $\mathrm{R}$
4 Greater than that across $\mathrm{R}$
Explanation:
B In LCR circuit at resonance the power dissipated across $\mathrm{L}$ or $\mathrm{C}$ is minimum because Phase difference between current and voltage is $\phi=90^{\circ}$
