RC, LR and LC Circuits with AC Sources
RC, LR and LC Circuits with AC Sources: Overview
This topic covers concepts, such as Capacitive Reactance, Choke Coil, Instantaneous Power in R-C Series AC Circuit, Pure Capacitance AC Circuit, Total Impedance in Series L-C-R Circuit, Special Cases in Series LCR Circuit, etc.
Important Questions on RC, LR and LC Circuits with AC Sources
An a.c. source, of voltage , 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?

An a.c. voltage of , is connected across resistor and inductor in series. What is the impedance of the circuit?

When an inductor and a resistor in series are connected across a , supply a current of flows in the circuit. The current differs in phase from applied voltage by radian. The value of is

Graph showing variation of current with frequency of source in a series circuit is,

Consider the circuit shown below. The input to the circuit is . The values of the components are and respectively. Then the R.M.S. value of the current flowing in the circuit is,

If the current in inductance is and that in capacitance is . What is the current drawn from the source?

What is XL and XC?

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

How do you draw a phasor diagram for RC circuit?

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

What is the impedance of LR series circuit?

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

What is the power consumed in RC circuit?

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

What is the impedance of LR series circuit?

How do you find the impedance of an ac circuit?

What is the power consumed in RC circuit?

What is a RC circuit in physics?

The average power dissipated in a pure inductance is

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