An inductor of 20 mH, a capacitor of 100 μF, and a resistor of 50 Ω are connected in series across a source of emf, V=10sin(314t). What is the power loss in this circuit?

1. 0.79 W

2. 0.43 W

3. 2.74 W

4. 1.13 W

Subtopic:  Power factor |
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Which of the following combinations should be selected for better tuning of an L-C-R circuit used for communication?

(a) R=20Ω, L=1.5H,C=35 μF

(b) R=25Ω, L=2.5H,C=45 μF

(c) R=15Ω, L=3.5H,C=30 μF

(d) R=25Ω, L=1.5H,C=45 μF

Subtopic:  Different Types of AC Circuits |
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The potential differences across the resistance, capacitance and inductance are 80 V, 40 V and 100 V respectively in an L-C-R circuit. What is the power factor of this circuit?

1. 0.4             

2. 0.5

3. 0.8             

4. 1.0

Subtopic:  Power factor |
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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 |
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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 |
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An inductor 20 mH, a capacitor 50μF, and a resistor 40Ω are connected in series across a source of emf V=10sin340t. The power loss in the AC circuit is:

1. 0.67 W

2. 0.78W

3. 0.89 W

4. 0.46 W

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. \(R=20~\Omega ,~L=1.5~H,~C=35~\mu F\)
2. \(R=25~\Omega ,~L=2.5~H,~C=45~\mu F\)
3. \(R=15~\Omega ,~L=3.5~H,~C=30~\mu F\)
4. \(R=25~\Omega ,~L=1.5~H,~C=45~\mu F\)

Subtopic:  Different Types of AC Circuits |
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A small-signal voltage V(t) = V0sinωt is applied across an ideal capacitor C: Find the correct statement from the options given below:
1. over a full cycle, the capacitor C does not consume any energy from the voltage source.
2. current l(t) is in phase with voltage V(t).
3. current l(t) leads voltage V(t) by 180°.
4. current l(t), lags voltage V(t) by 90o

Subtopic:  RMS & Average Values | Different Types of AC Circuits |
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An inductor 20mH, a capacitor 50μF, and a resistor 40Ω are connected in series across a source of emf V = 10sin340t. The power loss in the AC circuit is:
1. 0.67 W
2. 0.76 W
3. 0.89 W
4. 0.51 W
Subtopic:  Different Types of AC Circuits |
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NEET MCQ Books for 11th Physics, Chemistry & Biology