A series \(RC\) circuit is connected to an alternating voltage source. Consider two situations:
(1) When the capacitor is air-filled. 
(2) When the capacitor is mica filled. 
The current through the resistor is \(i\) and the voltage across the capacitor is \(V\) then:
1. \(V_a< V_b\)
2. \(V_a> V_b\)
3. \(i_a>i_b\)
4. \(V_a = V_b\)

Subtopic:  Different Types of AC Circuits |
 66%
From NCERT
NEET - 2015
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In an AC circuit, an alternating voltage \(\varepsilon=200 \sqrt{2} \sin (100 t)~\text{V}\) is connected to a capacitor of capacity \(1~\mu \text{F}.\) The RMS value of the current in the circuit is:
1. \(100~\text{mA}\) 2. \(200~\text{mA}\)
3. \(20~\text{mA}\) 4. \(10~\text{mA}\)
Subtopic:  RMS & Average Values | Different Types of AC Circuits |
 76%
From NCERT
AIPMT - 2011
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An AC voltage is applied to a resistance R and an inductor L in series. If R and the inductive reactance are both equal to 3 Ω, the phase difference between the applied voltage and the current in the circuit is:

1.  π4

2.  π2

3.  zero

4.  π6

Subtopic:  Different Types of AC Circuits |
 69%
From NCERT
AIPMT - 2011
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A coil has a resistance of \(30~ \mathrm{ohm}\) and inductive reactance of \(20 ~\mathrm{ohm}\) at a \(50~\mathrm{ Hz}\) frequency. If an \(\mathrm{ac}\) source of \(200 ~\mathrm{volts,}\) \(100~\mathrm{ Hz}\) is connected across the coil, the current in the coil will be:

1. \(2.0~\mathrm{ A}\) 2. \(4.0~\mathrm{ A}\)
3. \(8.0~\mathrm{ A}\) 4. \(20/\sqrt{13}~\mathrm{A}\)
Subtopic:  Different Types of AC Circuits |
 60%
From NCERT
AIPMT - 2011
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In the given circuit, the reading of voltmeter V1 and V2 are 300 V each. The reading of the voltmeter Vand ammeter A are respectively:


1. 150 V, 2.2 A

2. 220 V, 2.2 A

3. 220 V, 2.0 A

4. 100 V, 2.0 A

Subtopic:  Different Types of AC Circuits |
 90%
From NCERT
AIPMT - 2010
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The power dissipated in an L-C-R series circuit connected to an AC source of emf E is:

1. \(\frac{\varepsilon^2R}{\Big[R^2+\Big(L\omega-\frac{1}{C\omega}\Big)^2\Big]}\)
2. \(\frac{\varepsilon^2\sqrt{R^2+\Big(L\omega-\frac{1}{C\omega}\Big)^2}}{R}~\)
3. \(\frac{\varepsilon^2\Big[R^2+\Big(L\omega-\frac{1}{C\omega}\Big)^2\Big]}{R}\)
4. \(\frac{\varepsilon^2R}{\sqrt{R^2+\Big(L\omega+\frac{1}{C\omega}\Big)^2}}~\)
Subtopic:  Different Types of AC Circuits |
 72%
From NCERT
AIPMT - 2009
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What is the value of inductance L for which the current is maximum in a series LCR circuit with C = 10 μF and ω=1000 s-1?

1. 100 mH

2. 1 mH

3. cannot be calculated unless R is known

4. 10 mH

Subtopic:  Different Types of AC Circuits |
 72%
From NCERT
AIPMT - 2007
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A coil of inductive reactance \(31~\Omega\) has a resistance of
\(8~\Omega\). It is placed in series with a condenser of capacitive reactance \(25~\Omega\). The combination is connected to an a.c. source of
\(110~\text{V}\). The power factor of the circuit is:
1. \(0.56\)
2. \(0.64\)
3. \(0.80\)
4. \(0.33\)

Subtopic:  Different Types of AC Circuits |
 78%
From NCERT
AIPMT - 2006
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