An inductor of inductance L and resistor of resistance R are joined in series and connected by a source of frequency ω. The power dissipated in the circuit is :

(1) (R2+ω2L2)V

(2) V2R(R2+ω2L2)

(3) V(R2+ω2L2)

(4) R2+ω2L2V2

Concept Questions :-

Different types of AC Circuits
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In a LCR circuit the pd between the terminals of the inductance is 60 V, between the terminals of the capacitor is 30V and that between the terminals of resistance is 40V. the supply voltage will be equal to …… 

(1) 50 V

(2) 70 V

(3) 130 V

(4) 10 V

Concept Questions :-

Different types of AC Circuits
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In a circuit L, C and R are connected in series with an alternating voltage source of frequency f. The current leads the voltage by 45°. The value of C is 

(1) 12πf(2πfL+R)

(2) 1πf(2πfL+R)

(c) 12πf(2πfLR)

(4) 1πf(2πfLR)

Concept Questions :-

Different types of AC Circuits
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For the series LCR circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency ?

1. 2500 rad/s and 52A

2. 2500 rad/s and 5A

3. 2500 rad/s and 52A

4. 25 rad/s and 52A

Concept Questions :-

LC oscillations
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In an LR-circuit, the inductive reactance is equal to the resistance R of the circuit. An e.m.f. E=E0cos(ωt) applied to the circuit. The power consumed in the circuit is:

(1) E02R

(2) E022R

(3) E024R

(4) E028R

Concept Questions :-

Different types of AC Circuits
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One 10 V, 60 W bulb is to be connected to 100 V line. The required induction coil has a self-inductance of value: (f = 50 Hz) 

(1) 0.052 H

(2) 2.42 H

(3) 16.2 mH

(4) 1.62 mH

Concept Questions :-

Different types of AC Circuits
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In the circuit given below, what will be the reading of the voltmeter 

(1) 300 V

(2) 900 V

(3) 200 V

(4) 400 V

Concept Questions :-

Different types of AC Circuits
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In the circuit shown below, what will be the readings of the voltmeter and ammeter 

(1) 800 V, 2A

(2) 300 V, 2A

(3) 220 V, 2.2 A

(4) 100 V, 2A

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The diagram shows a capacitor C and a resistor R connected in series to an ac source. V1 and V2 are voltmeters and A is an ammeter:

Consider now the following statements

I. Readings in A and V2 are always in phase

II. Reading in V1 is ahead in phase with reading in V2

III. Readings in A and V1 are always in phase

Which of these statements is/are correct?

(1) I only

(2) II only

(3) I and II only

(4) II and III only

Concept Questions :-

Different types of AC Circuits
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In the circuit shown in figure neglecting source resistance the voltmeter and ammeter reading will respectively, will be 

(1) 0V, 3A

(2) 150V, 3A

(3) 150V, 6A

(4) 0V, 8A

Concept Questions :-

Different types of AC Circuits
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