356170
Assertion : No power loss is associated with pure capacitor in ac circuit. Reason : No current is flowing in this circuit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(P = {V_{rms}}{I_{rms}}\cos \phi = 0\) \(\left(\because\right.\) Here \(\left.\phi=90^{\circ}\right)\) But current is indeed flowing in circuit. So correct option is (3).
PHXII07:ALTERNATING CURRENT
356171
The average power dissipation in a pure capacitance \(a.c\) circuit is:
1 \(\dfrac{C V^{2}}{2}\)
2 \(\mathrm{CV}^{2}\)
3 \(\dfrac{C V^{2}}{4}\)
4 Zero
Explanation:
Average power in \(a c\) circuit is given by: \(P=V_{r m s} I_{r m s} \cos \phi\) For pure capacitor circuit \(\phi=90^{\circ} \Rightarrow \cos \phi=0\) \(\Rightarrow P=0\). So, correct option is (4).
PHXII07:ALTERNATING CURRENT
356172
In an \(LR\)- circuit, the inductive reactance is equal to to the resistance \(R\) of the circuit. An e.m.f. \(E = {E_0}\cos \left( {\omega t} \right)\) applied to the circuit. The power consumed in the circuit is
356173
A resistor and an inductor are connected to an ac supply of \(120V\) and \(50Hz\). The current in the circuit is \(3A\). If the power consumed in the circuit is \(108W\), then the resistance in the circuit is
1 \(360\Omega \)
2 \(40\Omega \)
3 \(12\Omega \)
4 \(\sqrt {(52 \times 28)} \Omega \)
Explanation:
In an ac circuit, a pure inductor does not consume any power. Therefore, power is consumed by the resistor only. \(\therefore P = {V_{rms}}{I_{rms}}\cos \phi = I_{rms}^2Z\left( {\frac{R}{Z}} \right) = I_{rms}^2R\) or \(108 = {\left( 3 \right)^2}R\,or\,R = 12\Omega \)
PHXII07:ALTERNATING CURRENT
356174
In an ac circuit, the reactance of a coil is \({\sqrt{3}}\) times its resistance. The phase difference between the voltage and current through the coil is
356170
Assertion : No power loss is associated with pure capacitor in ac circuit. Reason : No current is flowing in this circuit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(P = {V_{rms}}{I_{rms}}\cos \phi = 0\) \(\left(\because\right.\) Here \(\left.\phi=90^{\circ}\right)\) But current is indeed flowing in circuit. So correct option is (3).
PHXII07:ALTERNATING CURRENT
356171
The average power dissipation in a pure capacitance \(a.c\) circuit is:
1 \(\dfrac{C V^{2}}{2}\)
2 \(\mathrm{CV}^{2}\)
3 \(\dfrac{C V^{2}}{4}\)
4 Zero
Explanation:
Average power in \(a c\) circuit is given by: \(P=V_{r m s} I_{r m s} \cos \phi\) For pure capacitor circuit \(\phi=90^{\circ} \Rightarrow \cos \phi=0\) \(\Rightarrow P=0\). So, correct option is (4).
PHXII07:ALTERNATING CURRENT
356172
In an \(LR\)- circuit, the inductive reactance is equal to to the resistance \(R\) of the circuit. An e.m.f. \(E = {E_0}\cos \left( {\omega t} \right)\) applied to the circuit. The power consumed in the circuit is
356173
A resistor and an inductor are connected to an ac supply of \(120V\) and \(50Hz\). The current in the circuit is \(3A\). If the power consumed in the circuit is \(108W\), then the resistance in the circuit is
1 \(360\Omega \)
2 \(40\Omega \)
3 \(12\Omega \)
4 \(\sqrt {(52 \times 28)} \Omega \)
Explanation:
In an ac circuit, a pure inductor does not consume any power. Therefore, power is consumed by the resistor only. \(\therefore P = {V_{rms}}{I_{rms}}\cos \phi = I_{rms}^2Z\left( {\frac{R}{Z}} \right) = I_{rms}^2R\) or \(108 = {\left( 3 \right)^2}R\,or\,R = 12\Omega \)
PHXII07:ALTERNATING CURRENT
356174
In an ac circuit, the reactance of a coil is \({\sqrt{3}}\) times its resistance. The phase difference between the voltage and current through the coil is
356170
Assertion : No power loss is associated with pure capacitor in ac circuit. Reason : No current is flowing in this circuit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(P = {V_{rms}}{I_{rms}}\cos \phi = 0\) \(\left(\because\right.\) Here \(\left.\phi=90^{\circ}\right)\) But current is indeed flowing in circuit. So correct option is (3).
PHXII07:ALTERNATING CURRENT
356171
The average power dissipation in a pure capacitance \(a.c\) circuit is:
1 \(\dfrac{C V^{2}}{2}\)
2 \(\mathrm{CV}^{2}\)
3 \(\dfrac{C V^{2}}{4}\)
4 Zero
Explanation:
Average power in \(a c\) circuit is given by: \(P=V_{r m s} I_{r m s} \cos \phi\) For pure capacitor circuit \(\phi=90^{\circ} \Rightarrow \cos \phi=0\) \(\Rightarrow P=0\). So, correct option is (4).
PHXII07:ALTERNATING CURRENT
356172
In an \(LR\)- circuit, the inductive reactance is equal to to the resistance \(R\) of the circuit. An e.m.f. \(E = {E_0}\cos \left( {\omega t} \right)\) applied to the circuit. The power consumed in the circuit is
356173
A resistor and an inductor are connected to an ac supply of \(120V\) and \(50Hz\). The current in the circuit is \(3A\). If the power consumed in the circuit is \(108W\), then the resistance in the circuit is
1 \(360\Omega \)
2 \(40\Omega \)
3 \(12\Omega \)
4 \(\sqrt {(52 \times 28)} \Omega \)
Explanation:
In an ac circuit, a pure inductor does not consume any power. Therefore, power is consumed by the resistor only. \(\therefore P = {V_{rms}}{I_{rms}}\cos \phi = I_{rms}^2Z\left( {\frac{R}{Z}} \right) = I_{rms}^2R\) or \(108 = {\left( 3 \right)^2}R\,or\,R = 12\Omega \)
PHXII07:ALTERNATING CURRENT
356174
In an ac circuit, the reactance of a coil is \({\sqrt{3}}\) times its resistance. The phase difference between the voltage and current through the coil is
NEET Test Series from KOTA - 10 Papers In MS WORD
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PHXII07:ALTERNATING CURRENT
356170
Assertion : No power loss is associated with pure capacitor in ac circuit. Reason : No current is flowing in this circuit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(P = {V_{rms}}{I_{rms}}\cos \phi = 0\) \(\left(\because\right.\) Here \(\left.\phi=90^{\circ}\right)\) But current is indeed flowing in circuit. So correct option is (3).
PHXII07:ALTERNATING CURRENT
356171
The average power dissipation in a pure capacitance \(a.c\) circuit is:
1 \(\dfrac{C V^{2}}{2}\)
2 \(\mathrm{CV}^{2}\)
3 \(\dfrac{C V^{2}}{4}\)
4 Zero
Explanation:
Average power in \(a c\) circuit is given by: \(P=V_{r m s} I_{r m s} \cos \phi\) For pure capacitor circuit \(\phi=90^{\circ} \Rightarrow \cos \phi=0\) \(\Rightarrow P=0\). So, correct option is (4).
PHXII07:ALTERNATING CURRENT
356172
In an \(LR\)- circuit, the inductive reactance is equal to to the resistance \(R\) of the circuit. An e.m.f. \(E = {E_0}\cos \left( {\omega t} \right)\) applied to the circuit. The power consumed in the circuit is
356173
A resistor and an inductor are connected to an ac supply of \(120V\) and \(50Hz\). The current in the circuit is \(3A\). If the power consumed in the circuit is \(108W\), then the resistance in the circuit is
1 \(360\Omega \)
2 \(40\Omega \)
3 \(12\Omega \)
4 \(\sqrt {(52 \times 28)} \Omega \)
Explanation:
In an ac circuit, a pure inductor does not consume any power. Therefore, power is consumed by the resistor only. \(\therefore P = {V_{rms}}{I_{rms}}\cos \phi = I_{rms}^2Z\left( {\frac{R}{Z}} \right) = I_{rms}^2R\) or \(108 = {\left( 3 \right)^2}R\,or\,R = 12\Omega \)
PHXII07:ALTERNATING CURRENT
356174
In an ac circuit, the reactance of a coil is \({\sqrt{3}}\) times its resistance. The phase difference between the voltage and current through the coil is
356170
Assertion : No power loss is associated with pure capacitor in ac circuit. Reason : No current is flowing in this circuit.
1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but reason is correct.
Explanation:
\(P = {V_{rms}}{I_{rms}}\cos \phi = 0\) \(\left(\because\right.\) Here \(\left.\phi=90^{\circ}\right)\) But current is indeed flowing in circuit. So correct option is (3).
PHXII07:ALTERNATING CURRENT
356171
The average power dissipation in a pure capacitance \(a.c\) circuit is:
1 \(\dfrac{C V^{2}}{2}\)
2 \(\mathrm{CV}^{2}\)
3 \(\dfrac{C V^{2}}{4}\)
4 Zero
Explanation:
Average power in \(a c\) circuit is given by: \(P=V_{r m s} I_{r m s} \cos \phi\) For pure capacitor circuit \(\phi=90^{\circ} \Rightarrow \cos \phi=0\) \(\Rightarrow P=0\). So, correct option is (4).
PHXII07:ALTERNATING CURRENT
356172
In an \(LR\)- circuit, the inductive reactance is equal to to the resistance \(R\) of the circuit. An e.m.f. \(E = {E_0}\cos \left( {\omega t} \right)\) applied to the circuit. The power consumed in the circuit is
356173
A resistor and an inductor are connected to an ac supply of \(120V\) and \(50Hz\). The current in the circuit is \(3A\). If the power consumed in the circuit is \(108W\), then the resistance in the circuit is
1 \(360\Omega \)
2 \(40\Omega \)
3 \(12\Omega \)
4 \(\sqrt {(52 \times 28)} \Omega \)
Explanation:
In an ac circuit, a pure inductor does not consume any power. Therefore, power is consumed by the resistor only. \(\therefore P = {V_{rms}}{I_{rms}}\cos \phi = I_{rms}^2Z\left( {\frac{R}{Z}} \right) = I_{rms}^2R\) or \(108 = {\left( 3 \right)^2}R\,or\,R = 12\Omega \)
PHXII07:ALTERNATING CURRENT
356174
In an ac circuit, the reactance of a coil is \({\sqrt{3}}\) times its resistance. The phase difference between the voltage and current through the coil is
