Electromagnetic Induction & Alternating Currents-LCR Series Circuit (NEET (National Eligibility cum Medical Entrance Test) Physics): Questions 6 - 8 of 18

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Question number: 6

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

In the circuit shown in figure neglecting source resistance the voltmeter and ammeter reading will respectively, be

Circuit Diagram of LCR

Circuit Diagram of LCR

LCR circuit diagram represent in the figure. Volt meter connected across the series connection of inductor and capacitor and ammeter measured current of circuit.

Choices

Choice (4) Response

a.

0V, 8A

b.

0V, 3A

c.

150 V, 6A

d.

150V, 3A

Question number: 7

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

For the series LCR circuit shown in the figure, what is the resonance frequency and the amplitude of the current at the resonating frequency

LCR circuit diagram

LCR Circuit Diagram

In figure L = 8 mH, C = 20 µF and R = 44 Ω are connected in series with 220 V ac supply.

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 8

» Electromagnetic Induction & Alternating Currents » LCR Series Circuit

MCQ▾

Question

An alternating emf of frequency Equation is applied to a series LCR circuit. For this frequency of the applied emf is,

Choices

Choice (4) Response

a.

The circuit is at resonance and its impedance is made up only of a reactive part.

b.

The current in the circuit is not in phase with the applied e. m. f. and the voltage across R equals this applied emf

c.

The sum of the potential differences across the inductance and capacitance equals the applied e. m. f. which is 180° ahead of phase of the current in the circuit

d.

The quality factor of the circuit is Equation or Equation and this is a measure of the voltage magnification (produced by the circuit at resonance) as well as the sharpness of resonance of the circuit.

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