274634
The ratio of mean value over half cycle to r.m.s. value of A.C. is
1 $2:\pi $
2 $2\sqrt{2}:\pi $
3 $\sqrt{2}:\pi $
4 $\sqrt{2}:1$
Explanation:
(b) We know that ${{\mathbf{I}}_{\text{rms}}}={{\mathbf{I}}_{0}}/\sqrt{2}$ and ${{\mathbf{I}}_{\text{m}}}=2{{\mathbf{I}}_{0}}/\pi $
$\therefore \frac{{{I}_{\text{m}}}}{{{\mathbf{I}}_{\text{rms}}}}=\frac{2\sqrt{2}}{\pi }$
NCERT Page-241 / N-184
AC (NCERT)
274635
When an ac voltage of $220\text{V}$ is applied to the capacitor $C$, then
1 the maximum voltage between plates is $220\text{V}$.
2 the current is in phase with the applied voltage.
3 the charge on the plate is not in phase with the applied votage.
4 power delivered to the capacitor per cycle is zero.
Explanation:
(d) When an ac voltage of $220\text{V}$ is applied to a capacitor $C$, the charge on the plates is in phase with the applied voltage.
As the circuit is pure capacitive so, the current developed leads the applied voltage by a phase angle of ${{90}^{\circ }}$ Hence, power delivered to the capacitor per cycle is $P={{V}_{\text{rms }\!\!~\!\!\text{ }}}{{I}_{\text{rms }\!\!~\!\!\text{ }}}\text{cos}{{90}^{\circ }}=0$.
NCERT Page-241 / N-184
AC (NCERT)
274636
In an ac circuit an alternating voltage $\text{e}=200\sqrt{2}\text{sin}100\text{t}$ volts is connected to a capacitor of capacity $1\mu \text{F}$. The r.m.s. value of the current in the circuit is
274637
Which of the following graphs represent the variation of current (I) with frequency (f) in an AC circuit containing a pure capacitor?
1
2
3
4
Explanation:
(c). $\text{I}=\frac{\text{V}}{{{\text{X}}_{\text{c}}}}$ in Pure Capacitor
$=\frac{\text{V}}{\frac{1}{2\pi \text{fc}}}=\text{V}2\pi \text{fc}$
$\Rightarrow $ I $\alpha \text{f}$
other parameters kept constant
NCERT Page-242 / N-185
AC (NCERT)
274638
Of the following about capacitive reactance which is correct?
1 The reactance of the capacitor is directly proportional to its ability to store charge
2 Capacitive reactance is inversely proportional to the frequency of the current
3 Capacitive reactanceis measured in farad
4 The reactance of a capacitor in an A.C. circuit is similar to the resistance of a capacitor in a D.C. circuit
Explanation:
(b) ${{X}_{C}}=\frac{1}{\omega C}\Rightarrow {{X}_{C}}\alpha \frac{1}{\omega }$ for given $C$.
274634
The ratio of mean value over half cycle to r.m.s. value of A.C. is
1 $2:\pi $
2 $2\sqrt{2}:\pi $
3 $\sqrt{2}:\pi $
4 $\sqrt{2}:1$
Explanation:
(b) We know that ${{\mathbf{I}}_{\text{rms}}}={{\mathbf{I}}_{0}}/\sqrt{2}$ and ${{\mathbf{I}}_{\text{m}}}=2{{\mathbf{I}}_{0}}/\pi $
$\therefore \frac{{{I}_{\text{m}}}}{{{\mathbf{I}}_{\text{rms}}}}=\frac{2\sqrt{2}}{\pi }$
NCERT Page-241 / N-184
AC (NCERT)
274635
When an ac voltage of $220\text{V}$ is applied to the capacitor $C$, then
1 the maximum voltage between plates is $220\text{V}$.
2 the current is in phase with the applied voltage.
3 the charge on the plate is not in phase with the applied votage.
4 power delivered to the capacitor per cycle is zero.
Explanation:
(d) When an ac voltage of $220\text{V}$ is applied to a capacitor $C$, the charge on the plates is in phase with the applied voltage.
As the circuit is pure capacitive so, the current developed leads the applied voltage by a phase angle of ${{90}^{\circ }}$ Hence, power delivered to the capacitor per cycle is $P={{V}_{\text{rms }\!\!~\!\!\text{ }}}{{I}_{\text{rms }\!\!~\!\!\text{ }}}\text{cos}{{90}^{\circ }}=0$.
NCERT Page-241 / N-184
AC (NCERT)
274636
In an ac circuit an alternating voltage $\text{e}=200\sqrt{2}\text{sin}100\text{t}$ volts is connected to a capacitor of capacity $1\mu \text{F}$. The r.m.s. value of the current in the circuit is
274637
Which of the following graphs represent the variation of current (I) with frequency (f) in an AC circuit containing a pure capacitor?
1
2
3
4
Explanation:
(c). $\text{I}=\frac{\text{V}}{{{\text{X}}_{\text{c}}}}$ in Pure Capacitor
$=\frac{\text{V}}{\frac{1}{2\pi \text{fc}}}=\text{V}2\pi \text{fc}$
$\Rightarrow $ I $\alpha \text{f}$
other parameters kept constant
NCERT Page-242 / N-185
AC (NCERT)
274638
Of the following about capacitive reactance which is correct?
1 The reactance of the capacitor is directly proportional to its ability to store charge
2 Capacitive reactance is inversely proportional to the frequency of the current
3 Capacitive reactanceis measured in farad
4 The reactance of a capacitor in an A.C. circuit is similar to the resistance of a capacitor in a D.C. circuit
Explanation:
(b) ${{X}_{C}}=\frac{1}{\omega C}\Rightarrow {{X}_{C}}\alpha \frac{1}{\omega }$ for given $C$.
274634
The ratio of mean value over half cycle to r.m.s. value of A.C. is
1 $2:\pi $
2 $2\sqrt{2}:\pi $
3 $\sqrt{2}:\pi $
4 $\sqrt{2}:1$
Explanation:
(b) We know that ${{\mathbf{I}}_{\text{rms}}}={{\mathbf{I}}_{0}}/\sqrt{2}$ and ${{\mathbf{I}}_{\text{m}}}=2{{\mathbf{I}}_{0}}/\pi $
$\therefore \frac{{{I}_{\text{m}}}}{{{\mathbf{I}}_{\text{rms}}}}=\frac{2\sqrt{2}}{\pi }$
NCERT Page-241 / N-184
AC (NCERT)
274635
When an ac voltage of $220\text{V}$ is applied to the capacitor $C$, then
1 the maximum voltage between plates is $220\text{V}$.
2 the current is in phase with the applied voltage.
3 the charge on the plate is not in phase with the applied votage.
4 power delivered to the capacitor per cycle is zero.
Explanation:
(d) When an ac voltage of $220\text{V}$ is applied to a capacitor $C$, the charge on the plates is in phase with the applied voltage.
As the circuit is pure capacitive so, the current developed leads the applied voltage by a phase angle of ${{90}^{\circ }}$ Hence, power delivered to the capacitor per cycle is $P={{V}_{\text{rms }\!\!~\!\!\text{ }}}{{I}_{\text{rms }\!\!~\!\!\text{ }}}\text{cos}{{90}^{\circ }}=0$.
NCERT Page-241 / N-184
AC (NCERT)
274636
In an ac circuit an alternating voltage $\text{e}=200\sqrt{2}\text{sin}100\text{t}$ volts is connected to a capacitor of capacity $1\mu \text{F}$. The r.m.s. value of the current in the circuit is
274637
Which of the following graphs represent the variation of current (I) with frequency (f) in an AC circuit containing a pure capacitor?
1
2
3
4
Explanation:
(c). $\text{I}=\frac{\text{V}}{{{\text{X}}_{\text{c}}}}$ in Pure Capacitor
$=\frac{\text{V}}{\frac{1}{2\pi \text{fc}}}=\text{V}2\pi \text{fc}$
$\Rightarrow $ I $\alpha \text{f}$
other parameters kept constant
NCERT Page-242 / N-185
AC (NCERT)
274638
Of the following about capacitive reactance which is correct?
1 The reactance of the capacitor is directly proportional to its ability to store charge
2 Capacitive reactance is inversely proportional to the frequency of the current
3 Capacitive reactanceis measured in farad
4 The reactance of a capacitor in an A.C. circuit is similar to the resistance of a capacitor in a D.C. circuit
Explanation:
(b) ${{X}_{C}}=\frac{1}{\omega C}\Rightarrow {{X}_{C}}\alpha \frac{1}{\omega }$ for given $C$.
274634
The ratio of mean value over half cycle to r.m.s. value of A.C. is
1 $2:\pi $
2 $2\sqrt{2}:\pi $
3 $\sqrt{2}:\pi $
4 $\sqrt{2}:1$
Explanation:
(b) We know that ${{\mathbf{I}}_{\text{rms}}}={{\mathbf{I}}_{0}}/\sqrt{2}$ and ${{\mathbf{I}}_{\text{m}}}=2{{\mathbf{I}}_{0}}/\pi $
$\therefore \frac{{{I}_{\text{m}}}}{{{\mathbf{I}}_{\text{rms}}}}=\frac{2\sqrt{2}}{\pi }$
NCERT Page-241 / N-184
AC (NCERT)
274635
When an ac voltage of $220\text{V}$ is applied to the capacitor $C$, then
1 the maximum voltage between plates is $220\text{V}$.
2 the current is in phase with the applied voltage.
3 the charge on the plate is not in phase with the applied votage.
4 power delivered to the capacitor per cycle is zero.
Explanation:
(d) When an ac voltage of $220\text{V}$ is applied to a capacitor $C$, the charge on the plates is in phase with the applied voltage.
As the circuit is pure capacitive so, the current developed leads the applied voltage by a phase angle of ${{90}^{\circ }}$ Hence, power delivered to the capacitor per cycle is $P={{V}_{\text{rms }\!\!~\!\!\text{ }}}{{I}_{\text{rms }\!\!~\!\!\text{ }}}\text{cos}{{90}^{\circ }}=0$.
NCERT Page-241 / N-184
AC (NCERT)
274636
In an ac circuit an alternating voltage $\text{e}=200\sqrt{2}\text{sin}100\text{t}$ volts is connected to a capacitor of capacity $1\mu \text{F}$. The r.m.s. value of the current in the circuit is
274637
Which of the following graphs represent the variation of current (I) with frequency (f) in an AC circuit containing a pure capacitor?
1
2
3
4
Explanation:
(c). $\text{I}=\frac{\text{V}}{{{\text{X}}_{\text{c}}}}$ in Pure Capacitor
$=\frac{\text{V}}{\frac{1}{2\pi \text{fc}}}=\text{V}2\pi \text{fc}$
$\Rightarrow $ I $\alpha \text{f}$
other parameters kept constant
NCERT Page-242 / N-185
AC (NCERT)
274638
Of the following about capacitive reactance which is correct?
1 The reactance of the capacitor is directly proportional to its ability to store charge
2 Capacitive reactance is inversely proportional to the frequency of the current
3 Capacitive reactanceis measured in farad
4 The reactance of a capacitor in an A.C. circuit is similar to the resistance of a capacitor in a D.C. circuit
Explanation:
(b) ${{X}_{C}}=\frac{1}{\omega C}\Rightarrow {{X}_{C}}\alpha \frac{1}{\omega }$ for given $C$.
274634
The ratio of mean value over half cycle to r.m.s. value of A.C. is
1 $2:\pi $
2 $2\sqrt{2}:\pi $
3 $\sqrt{2}:\pi $
4 $\sqrt{2}:1$
Explanation:
(b) We know that ${{\mathbf{I}}_{\text{rms}}}={{\mathbf{I}}_{0}}/\sqrt{2}$ and ${{\mathbf{I}}_{\text{m}}}=2{{\mathbf{I}}_{0}}/\pi $
$\therefore \frac{{{I}_{\text{m}}}}{{{\mathbf{I}}_{\text{rms}}}}=\frac{2\sqrt{2}}{\pi }$
NCERT Page-241 / N-184
AC (NCERT)
274635
When an ac voltage of $220\text{V}$ is applied to the capacitor $C$, then
1 the maximum voltage between plates is $220\text{V}$.
2 the current is in phase with the applied voltage.
3 the charge on the plate is not in phase with the applied votage.
4 power delivered to the capacitor per cycle is zero.
Explanation:
(d) When an ac voltage of $220\text{V}$ is applied to a capacitor $C$, the charge on the plates is in phase with the applied voltage.
As the circuit is pure capacitive so, the current developed leads the applied voltage by a phase angle of ${{90}^{\circ }}$ Hence, power delivered to the capacitor per cycle is $P={{V}_{\text{rms }\!\!~\!\!\text{ }}}{{I}_{\text{rms }\!\!~\!\!\text{ }}}\text{cos}{{90}^{\circ }}=0$.
NCERT Page-241 / N-184
AC (NCERT)
274636
In an ac circuit an alternating voltage $\text{e}=200\sqrt{2}\text{sin}100\text{t}$ volts is connected to a capacitor of capacity $1\mu \text{F}$. The r.m.s. value of the current in the circuit is
274637
Which of the following graphs represent the variation of current (I) with frequency (f) in an AC circuit containing a pure capacitor?
1
2
3
4
Explanation:
(c). $\text{I}=\frac{\text{V}}{{{\text{X}}_{\text{c}}}}$ in Pure Capacitor
$=\frac{\text{V}}{\frac{1}{2\pi \text{fc}}}=\text{V}2\pi \text{fc}$
$\Rightarrow $ I $\alpha \text{f}$
other parameters kept constant
NCERT Page-242 / N-185
AC (NCERT)
274638
Of the following about capacitive reactance which is correct?
1 The reactance of the capacitor is directly proportional to its ability to store charge
2 Capacitive reactance is inversely proportional to the frequency of the current
3 Capacitive reactanceis measured in farad
4 The reactance of a capacitor in an A.C. circuit is similar to the resistance of a capacitor in a D.C. circuit
Explanation:
(b) ${{X}_{C}}=\frac{1}{\omega C}\Rightarrow {{X}_{C}}\alpha \frac{1}{\omega }$ for given $C$.
