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Q. No.Choose the correct statements regarding a series \(\text{LCR}\) circuit.
1.
voltage across the capacitor lags behind the current.
2.
voltage across the inductor leads the current.
3.
voltage across \(\text{R}\) is in phase with the current.
4.
all of the above.
Subtopic: Different Types of AC Circuits |
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | If the frequency of the applied AC is doubled, then the power factor of a series R-L circuit decreases. |
| Reason (R): | Power factor of series R-L circuit is given by \(\cos \theta=\frac{2 \mathrm{R}}{\sqrt{\mathrm{R}^{2}+\omega^{2} \mathrm{~L}^{2}}}.\) |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Different Types of AC Circuits |
70%
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Large-scale transmission and distribution of electric energy over long distances are done by stepping the voltage up by a transformer. |
| Reason (R): | This cuts down the loss of energy due to eddy currents. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Transformer |
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | If the terminals of the primary of a transformer are connected across a battery then no emf is induced across the secondary in a steady state. |
| Reason (R): | The battery provides a steady current, so there is no change in flux linked with the secondary. |
In the light of the above statements choose the correct answer from the options given below:
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
Subtopic: Transformer |
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From NCERT
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Alternating voltage \(V=V_0\sin\omega t\) is applied to a circuit containing some elements in series. Match the values of current in Column-I with the possible elements connected in the circuit in Column-II.
| Column-I | Column-II | ||
| (A) | \(I=I_0\sin\omega t\) | (P) | only inductor circuit |
| (B) | \(I=-I_0\cos\omega t\) | (Q) | may be \(C\text{-}R\) circuit |
| (C) | \(I=I_0 \sin \left(\omega t+\frac{\pi}{4}\right)\) | (R) | may be \(L\text{-}R\) circuit |
| (D) | \(I=I_0 \sin \left(\omega t-\frac{\pi}{4}\right)\) | (S) | only resistance circuit |
| 1. | A → S, B → Q, C → P, D → R |
| 2. | A → P, B → S, C → R, D → Q |
| 3. | A → S, B → P, C → Q, D → R |
| 4. | A → S, B → P, C → R, D → Q |
Subtopic: Different Types of AC Circuits |
71%
From NCERT
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In a series \(LCR\) circuit connected across (\(220\) V, \(50\) Hz) ac supply. If the inductive reactance of the circuit is \(79.6\) \(\Omega.\) If the power delivered in the circuit is maximum, then the capacitance of the circuit is:
1. \(40\) \(\mu\)F
2. \(30\) \(\mu\)F
3. \(20\) \(\mu\)F
4. \(50\) \(\mu\)F
1. \(40\) \(\mu\)F
2. \(30\) \(\mu\)F
3. \(20\) \(\mu\)F
4. \(50\) \(\mu\)F
Subtopic: Different Types of AC Circuits |
70%
From NCERT
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A series LCR circuit containing \(5.0~\text{H}\) inductor, \(80~\mu \text{F}\) capacitor and \(40~\Omega\) resistor is connected to \(230~\text{V}\) variable frequency AC source. The angular frequencies of the source at which power transferred to the circuit is half the power at the resonant angular frequency are likely to be:
| 1. | \(46~\text{rad/s}~\text{and}~54~\text{rad/s}\) |
| 2. | \(42~\text{rad/s}~\text{and}~58~\text{rad/s}\) |
| 3. | \(25~\text{rad/s}~\text{and}~75~\text{rad/s}\) |
| 4. | \(50~\text{rad/s}~\text{and}~25~\text{rad/s}\) |
Subtopic: Different Types of AC Circuits |
From NCERT
NEET - 2021
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NEET 2023 - Target Batch - Aryan Raj Singh
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A lamp is connected in series with a capacitor. AC and DC sources are connected to the circuit one by one, then mark the correct statement/s.
| 1. | when the DC source is connected to the capacitor, the lamp will not glow in a steady-state condition. |
| 2. | when the AC source is connected to the capacitor and the capacitance of the capacitor is reduced, the lamp will glow less brightly. |
| 3. | when the DC source is connected to the capacitor and the capacitance of the capacitor is reduced, the lamp will glow less brightly. |
| 4. | both (1) and (2). |
Subtopic: Different Types of AC Circuits |
76%
From NCERT
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Turn ratio of a step-up transformer is \(1: 25\). If current in load coil is \(2~\text{A}\), then the current in primary coil will be:
| 1. | \(25~\text{A}\) | 2. | \(50~\text{A}\) |
| 3. | \(0.25~\text{A}\) | 4. | \(0.5~\text{A}\) |
Subtopic: Transformer |
88%
From NCERT
AIPMT - 1998
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NEET 2023 - Target Batch - Aryan Raj Singh
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Subtopic: Different Types of AC Circuits |
78%
From NCERT
AIPMT - 2000
To view explanation, please take trial in the course.
NEET 2023 - Target Batch - Aryan Raj Singh
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NEET 2023 - Target Batch - Aryan Raj Singh
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