Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
 
Assertion (A): A glowing bulb becomes dim when an iron bar is put in the inductor in series LR ac circuit.
Reason (R): Resistance of circuit increases.

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 |
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): 
Assertion (A): When ac circuit contains resistor only, its power is minimum.
Reason (R): Power of a circuit is independent of phase angle.
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:  Power factor |
 72%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R): 
 
Assertion (A): A transformer cannot work on a steady DC supply.
Reason (R): Steady DC changes neither in magnitude nor in direction.

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 |
 77%
From NCERT
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In a purely resistive AC circuit, which of the following sketches represents the variation of the current amplitude I0 with the frequency \(\mathit{\omega}\)?
1.   2.  
3.   4.   
Subtopic:  Different Types of AC Circuits |
 62%
From NCERT
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The variation of an alternating current \(I=I_0 \mathrm{sin}(\omega t)\) with time \((t)\) is shown in the figure below. The average value of current for the half-cycle will be: 
               
1. \(\frac{I_{0}}{\pi}\)
2. \(\frac{I_{0}}{2}\)
3. \(\frac{2 I_{0}}{\pi}\)
4. \(\frac{I_{0}}{2 \pi}\)
Subtopic:  RMS & Average Values |
 80%
From NCERT
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An AC supply is connected across a series \(LCR\) circuit. If the capacitor is removed, then which of the following phasor diagram may be correct for the remaining circuit? 
 
1.   2.  
3.    4.  
Subtopic:  Different Types of AC Circuits |
From NCERT
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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 |
 87%
From NCERT
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The plot of current \(i\) in \(LCR\) series circuit with the frequency \(f\) of the applied AC source is best represented by:
1. 2.
3. 4.
Subtopic:  Different Types of AC Circuits |
 71%
From NCERT
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A series R-C circuit is connected to an alternating voltage source. Consider two situations
(A) When the capacitor is air filled.
(B) When the capacitor is mica filled.
Current passing through the resistor is \(I\) and voltage drop on capacitor is \(V\). Then:
1. \(V_A>V_B\)
2. \(V_A<V_B\)
3. \(V_A=V_B\)
4. it can't be predicted.
Subtopic:  Different Types of AC Circuits |
 70%
From NCERT
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NEET 2023 - Target Batch - Aryan Raj Singh

Given below are two statements:
Statement I: In an AC circuit, the current through a capacitor leads the voltage across it.
Statement II: In AC circuits containing pure capacitance only, the phase difference between the current and the voltage is \(\pi.\)
 
1. Both Statement I and Statement II are correct.
2. Both Statement I and Statement II are incorrect.
3. Statement I is correct but Statement II is incorrect.
4. Statement I is incorrect but Statement II is correct.
Subtopic:  Different Types of AC Circuits |
 67%
From NCERT
NEET - 2022
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