155132
In an a.c. circuit containing $L, C, R$ is series, the ratio of true power to apparent power is $(Z$ $=$ impedance of the circuit, $R=$ resistance, $\phi=$ phase difference between the r.m.s. values of current and e.m.f.)
1 $\frac{\mathrm{R}}{\mathrm{Z}}$
2 $\frac{Z}{R}$
3 $\cot \phi$
4 RZ
Explanation:
A In an A.C circuit containing L,C, $R$ is series the ratio of true power to the apparent power is known as $\mathrm{R} / \mathrm{Z}$.
MHT-CET 2020
Alternating Current
155140
For an R-L-C circuit, driven with voltage of amplitude $V_{m}$ and frequency $\omega_{0}=\frac{1}{\sqrt{\mathrm{LC}}}$, the current exhibits resonance. The quality factor $Q$ is
1 $\frac{\omega_{0} R}{L}$
2 $\frac{\mathrm{R}}{\omega_{0} \mathrm{C}}$
3 $\frac{\mathrm{CR}}{\omega_{0}}$
4 $\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$
Explanation:
D For a series R-L-C circuit quality factor can be given by - $\mathrm{Q}=\frac{X_{\mathrm{L}}}{\mathrm{R}}$ $\mathrm{Q}=\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$ $\left\{\because \mathrm{X}_{\mathrm{L}}=\omega_{0} \mathrm{~L}\right\}$
TS- EAMCET.11.09.2020
Alternating Current
155143
In CR-circuit the growth of charge on the capacitor is
1 more rapid if the CR is smaller
2 more rapid if the $\mathrm{CR}$ is larger
3 independent of CR
4 independent of time
Explanation:
A In CR circuit, the growth on capacitor occurs as- $\mathrm{Q}=\mathrm{Q}_{0}\left(1-\mathrm{e}^{-\mathrm{t} / \mathrm{RC}}\right)$ When product of $\mathrm{CR}$ is small, then time constant for $\mathrm{CR}$ circuit is small and growth of charge will be more rapid.
TS- EAMCET-10.09.2020
Alternating Current
155156
The resonant frequency of an LCR circuit occurs at a frequency equal to:
1 $\frac{1}{\mathrm{LC}}$
2 $\frac{1}{\sqrt{\mathrm{LC}}}$
3 $\frac{1}{\mathrm{LCR}}$
4 $\frac{1}{\mathrm{CR}}$
Explanation:
B The resonant frequency of an LCR circuit occurs at a frequency- $\omega_{\mathrm{r}}=\frac{1}{\sqrt{\mathrm{LC}}}$ Where, $\mathrm{L}=$ Inductance $\mathrm{C}=\text { Capacitance }$
155132
In an a.c. circuit containing $L, C, R$ is series, the ratio of true power to apparent power is $(Z$ $=$ impedance of the circuit, $R=$ resistance, $\phi=$ phase difference between the r.m.s. values of current and e.m.f.)
1 $\frac{\mathrm{R}}{\mathrm{Z}}$
2 $\frac{Z}{R}$
3 $\cot \phi$
4 RZ
Explanation:
A In an A.C circuit containing L,C, $R$ is series the ratio of true power to the apparent power is known as $\mathrm{R} / \mathrm{Z}$.
MHT-CET 2020
Alternating Current
155140
For an R-L-C circuit, driven with voltage of amplitude $V_{m}$ and frequency $\omega_{0}=\frac{1}{\sqrt{\mathrm{LC}}}$, the current exhibits resonance. The quality factor $Q$ is
1 $\frac{\omega_{0} R}{L}$
2 $\frac{\mathrm{R}}{\omega_{0} \mathrm{C}}$
3 $\frac{\mathrm{CR}}{\omega_{0}}$
4 $\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$
Explanation:
D For a series R-L-C circuit quality factor can be given by - $\mathrm{Q}=\frac{X_{\mathrm{L}}}{\mathrm{R}}$ $\mathrm{Q}=\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$ $\left\{\because \mathrm{X}_{\mathrm{L}}=\omega_{0} \mathrm{~L}\right\}$
TS- EAMCET.11.09.2020
Alternating Current
155143
In CR-circuit the growth of charge on the capacitor is
1 more rapid if the CR is smaller
2 more rapid if the $\mathrm{CR}$ is larger
3 independent of CR
4 independent of time
Explanation:
A In CR circuit, the growth on capacitor occurs as- $\mathrm{Q}=\mathrm{Q}_{0}\left(1-\mathrm{e}^{-\mathrm{t} / \mathrm{RC}}\right)$ When product of $\mathrm{CR}$ is small, then time constant for $\mathrm{CR}$ circuit is small and growth of charge will be more rapid.
TS- EAMCET-10.09.2020
Alternating Current
155156
The resonant frequency of an LCR circuit occurs at a frequency equal to:
1 $\frac{1}{\mathrm{LC}}$
2 $\frac{1}{\sqrt{\mathrm{LC}}}$
3 $\frac{1}{\mathrm{LCR}}$
4 $\frac{1}{\mathrm{CR}}$
Explanation:
B The resonant frequency of an LCR circuit occurs at a frequency- $\omega_{\mathrm{r}}=\frac{1}{\sqrt{\mathrm{LC}}}$ Where, $\mathrm{L}=$ Inductance $\mathrm{C}=\text { Capacitance }$
155132
In an a.c. circuit containing $L, C, R$ is series, the ratio of true power to apparent power is $(Z$ $=$ impedance of the circuit, $R=$ resistance, $\phi=$ phase difference between the r.m.s. values of current and e.m.f.)
1 $\frac{\mathrm{R}}{\mathrm{Z}}$
2 $\frac{Z}{R}$
3 $\cot \phi$
4 RZ
Explanation:
A In an A.C circuit containing L,C, $R$ is series the ratio of true power to the apparent power is known as $\mathrm{R} / \mathrm{Z}$.
MHT-CET 2020
Alternating Current
155140
For an R-L-C circuit, driven with voltage of amplitude $V_{m}$ and frequency $\omega_{0}=\frac{1}{\sqrt{\mathrm{LC}}}$, the current exhibits resonance. The quality factor $Q$ is
1 $\frac{\omega_{0} R}{L}$
2 $\frac{\mathrm{R}}{\omega_{0} \mathrm{C}}$
3 $\frac{\mathrm{CR}}{\omega_{0}}$
4 $\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$
Explanation:
D For a series R-L-C circuit quality factor can be given by - $\mathrm{Q}=\frac{X_{\mathrm{L}}}{\mathrm{R}}$ $\mathrm{Q}=\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$ $\left\{\because \mathrm{X}_{\mathrm{L}}=\omega_{0} \mathrm{~L}\right\}$
TS- EAMCET.11.09.2020
Alternating Current
155143
In CR-circuit the growth of charge on the capacitor is
1 more rapid if the CR is smaller
2 more rapid if the $\mathrm{CR}$ is larger
3 independent of CR
4 independent of time
Explanation:
A In CR circuit, the growth on capacitor occurs as- $\mathrm{Q}=\mathrm{Q}_{0}\left(1-\mathrm{e}^{-\mathrm{t} / \mathrm{RC}}\right)$ When product of $\mathrm{CR}$ is small, then time constant for $\mathrm{CR}$ circuit is small and growth of charge will be more rapid.
TS- EAMCET-10.09.2020
Alternating Current
155156
The resonant frequency of an LCR circuit occurs at a frequency equal to:
1 $\frac{1}{\mathrm{LC}}$
2 $\frac{1}{\sqrt{\mathrm{LC}}}$
3 $\frac{1}{\mathrm{LCR}}$
4 $\frac{1}{\mathrm{CR}}$
Explanation:
B The resonant frequency of an LCR circuit occurs at a frequency- $\omega_{\mathrm{r}}=\frac{1}{\sqrt{\mathrm{LC}}}$ Where, $\mathrm{L}=$ Inductance $\mathrm{C}=\text { Capacitance }$
155132
In an a.c. circuit containing $L, C, R$ is series, the ratio of true power to apparent power is $(Z$ $=$ impedance of the circuit, $R=$ resistance, $\phi=$ phase difference between the r.m.s. values of current and e.m.f.)
1 $\frac{\mathrm{R}}{\mathrm{Z}}$
2 $\frac{Z}{R}$
3 $\cot \phi$
4 RZ
Explanation:
A In an A.C circuit containing L,C, $R$ is series the ratio of true power to the apparent power is known as $\mathrm{R} / \mathrm{Z}$.
MHT-CET 2020
Alternating Current
155140
For an R-L-C circuit, driven with voltage of amplitude $V_{m}$ and frequency $\omega_{0}=\frac{1}{\sqrt{\mathrm{LC}}}$, the current exhibits resonance. The quality factor $Q$ is
1 $\frac{\omega_{0} R}{L}$
2 $\frac{\mathrm{R}}{\omega_{0} \mathrm{C}}$
3 $\frac{\mathrm{CR}}{\omega_{0}}$
4 $\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$
Explanation:
D For a series R-L-C circuit quality factor can be given by - $\mathrm{Q}=\frac{X_{\mathrm{L}}}{\mathrm{R}}$ $\mathrm{Q}=\frac{\omega_{0} \mathrm{~L}}{\mathrm{R}}$ $\left\{\because \mathrm{X}_{\mathrm{L}}=\omega_{0} \mathrm{~L}\right\}$
TS- EAMCET.11.09.2020
Alternating Current
155143
In CR-circuit the growth of charge on the capacitor is
1 more rapid if the CR is smaller
2 more rapid if the $\mathrm{CR}$ is larger
3 independent of CR
4 independent of time
Explanation:
A In CR circuit, the growth on capacitor occurs as- $\mathrm{Q}=\mathrm{Q}_{0}\left(1-\mathrm{e}^{-\mathrm{t} / \mathrm{RC}}\right)$ When product of $\mathrm{CR}$ is small, then time constant for $\mathrm{CR}$ circuit is small and growth of charge will be more rapid.
TS- EAMCET-10.09.2020
Alternating Current
155156
The resonant frequency of an LCR circuit occurs at a frequency equal to:
1 $\frac{1}{\mathrm{LC}}$
2 $\frac{1}{\sqrt{\mathrm{LC}}}$
3 $\frac{1}{\mathrm{LCR}}$
4 $\frac{1}{\mathrm{CR}}$
Explanation:
B The resonant frequency of an LCR circuit occurs at a frequency- $\omega_{\mathrm{r}}=\frac{1}{\sqrt{\mathrm{LC}}}$ Where, $\mathrm{L}=$ Inductance $\mathrm{C}=\text { Capacitance }$
