CR Circuits: Electronic Circuits comprising of network of Capacitors and Resistances.

Resistor-capacitor circuit (RC circuit), or RC filter or RC network, is an electric circuit composed of resistors and capacitors driven by a voltage or current source.

The rate of growth of voltage with time will be dependent upon the product of capacitance and resistance. This value is called as the time constant of the circuit.

Time constant, t = C × R

where C is the value of capacitance (F), R is the resistance (F), and t is the time constant (s). 

LR Circuits:

A resistor-inductor circuit (RL circuit), or RL filter or RL network, is one of the simplest analogue infinite impulse response electronic filters. It consists of a resistor and an inductor, either in series or in parallel, driven by a voltage source.

The rate of change of current with time will depend upon the ratio of inductance to resistance and is

called as the time constant.

Time constant, t = L/R

where L is the value of inductance (H), R is the resistance (F), and t is the time constant (s). 

RLC Circuits:

An RLC circuit is a kind of electrical circuit composed of a resistor (R), an inductor (L), and a capacitor (C).

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