RC, LR and LC Circuits with AC Sources

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RC, LR and LC Circuits with AC Sources: Overview

This topic covers concepts such as AC Circuit, Pure Resistance AC Circuit, Pure Capacitance AC Circuit, Pure Inductance AC Circuit, Reactance, Capacitive Reactance, Inductive Reactance, and Total Impedance in Series L-C-R Circuit.

Important Questions on RC, LR and LC Circuits with AC Sources

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 1

An a.c. source, of voltage $V = V_{m} \sin ω t$ , is applied across a series LCR circuit. Which of the following is the phasor diagram for the circuit when capacitative impedance exceeds the inductive impedance?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 2

An a.c. voltage of $100 V$ , $50 Hz$ is connected across $20 Ω$ resistor and $2 mH$ inductor in series. What is the impedance of the circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 3

When an inductor $L$ and a resistor $R$ in series are connected across a $12 V$ , $50 Hz$ supply a current of $0.5 A$ flows in the circuit. The current differs in phase from applied voltage by $\frac{π}{3}$ radian. The value of $R$ is

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 4

Graph showing variation of current with frequency of $A C$ source in a series $L C R$ circuit is,

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 5

What is XL and XC?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 6

How do you find total impedance in a series parallel circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 7

How do you draw a phasor diagram for RC circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 8

What is the formula for impedance in an RL series circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 9

What is the impedance of LR series circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 10

What is average power in AC circuit derive an expression to obtain average power

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 11

What is the power consumed in RC circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 12

What is the formula for power in AC RC series circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 13

What is the impedance of LR series circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 14

How do you find the impedance of an ac circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 15

What is the power consumed in RC circuit?

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 16

The average power dissipated in a pure inductance is

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 17

Assertion : The alternating current lags behind the e.m.f. by a phase angle of $\frac{π}{2}$ , when AC flows through an inductor.
Reason : The inductive reactance increases as the frequency of AC source decreases.

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 18

Assertion: In a purely resistive ac circuit instantaneous power varies sinusoidally.

Reason: Applied ac voltage varies sinusoidally.

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 19

A sinusoidal voltage $v = 200 \sin 314 t$ is applied to a resistor of $10 Ω$ resistance. Calculate the power dissipated as heat in $watt$ .

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Physics>Alternating Current>RC, LR and LC Circuits with AC Sources> Q 20