Which of the following plots may represent the reactance of a series of \(LC\) combinations?

        
1. \(a\)
2. \(b\)
3. \(c\)
4. \(d\)

Subtopic:  Different Types of AC Circuits |
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Which of the following combinations should be selected for better tuning of an L-C-R circuit used for communication?

1. R=20Ω, L=1.5H,C=35 μF

2. R=25Ω, L=2.5H,C=45 μF

3. R=15Ω, L=3.5H,C=30 μF

4. R=25Ω, L=1.5H,C=45 μF

Subtopic:  Different Types of AC Circuits |
 70%
From NCERT
NEET - 2016
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The potential differences across the resistance, capacitance and inductance are \(80\) V, \(40\) V and \(100\) V respectively in an \(LCR\) circuit. What is the power factor of this circuit?
1. \(0.4\)
2. \(0.5\)
3. \(0.8\)
4. \(1.0\)

Subtopic:  Power factor |
 81%
From NCERT
NEET - 2016
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A 100 Ω resistance and a capacitor of 100 Ω reactance are connected in series across a 220 V source. When the capacitor is 50% charged, the peak value of the displacement current is

1. 2.2 A             

2. 11A

3. 4.4A               

4. 112A

Subtopic:  Different Types of AC Circuits |
 57%
From NCERT
NEET - 2016
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A small-signal voltage V(t)=Vo sinωt is applied across an ideal capacitor C 
(1) over a full cycle, the capacitor C does not consume any energy from the voltage source

(2) current I(t) is in phase with voltage V(t)

(3) current I(t) leads voltage V(t) by 180°

(4) current I(t) lags voltage V(t) by 90°

Subtopic:  Different Types of AC Circuits |
 70%
From NCERT
NEET - 2016
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A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6A, the voltage across the secondary coil and the current in the primary coil respectively are
1. 300V,15A
2. 450V,15A

3. 450V,13.5A

4. 600V,15A

Subtopic:  Transformer |
 75%
From NCERT
NEET - 2014
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A coil of self-inductance \(L\) is connected in series with a bulb \(B\) and an AC source. The brightness of the bulb decreases when:
1. Frequency of the AC source is decreased
2. The number of turns in the coil is reduced
3. A capacitance of reactance \(X_C = X_L\) is included in the same circuit
4. An iron rod is inserted in the coil
Subtopic:  Different Types of AC Circuits |
 69%
From NCERT
NEET - 2013
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In an electrical circuit R, L, C, and an AC voltage source are all connected in series. When L is removed from the circuit, the phase difference between the voltage and the current in the circuit is π/3. If instead, C is removed from the circuit, the phase difference is again π/3. The power factor of the circuit is

(1) 1/2                                           

(2) 1/2

(3) 1                                             

(4) 3/2

Subtopic:  Different Types of AC Circuits |
 71%
From NCERT
NEET - 2020
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The instantaneous values of alternating

current and voltages in a circuit are given

as 

i=12sin(100πt) ampere
e=12sin(100πt+π/3) volt

The average power in Watts consumed in the

circuit is

(a) 14

(b) 34

(c) 12 

(d) 18

Subtopic:  Different Types of AC Circuits |
 70%
From NCERT
NEET - 2012
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In an AC circuit an alternating voltage e=200 2 sin 100t volt is connected to a capacitor 1 μF. The rms value of the current in the circuit is

(a) 100 mA

(b) 200 mA

(c) 20 mA

(d) 10 mA

Subtopic:  RMS & Average Values | Different Types of AC Circuits |
 76%
NEET - 2011
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