RL Circuit

 RL Circuit:

What do you mean by RL circuit ?

DEFINE:

                  A resistor–inductor circuit, or RL filter or RL network, is an electric circuit composed of resistors and inductors driven by a voltage or current source. A first-order RL circuit is composed of one resistor and one inductor, either in series driven by a voltage source or in parallel driven by a current source.

Description:

This circuit shows the current step response of an RL network. The step is generated at t=0, when the switch is closed. The initial Current of the inductor can be set.

V-I CHARATERISTIC:

Inductor current:

This formula is the result of a differential equation, as the voltage across an inductor is proportional to the derivative of the current flowing in it.

Inductor voltage:

This formula can be obtained again by solving a differential equation, or with the previous formula and then applying the Ohm's law.

L/R time constant:

Also called t, this constant gives the time required to charge the inductor. In particular, after a time of 5RC the inductor will reach the 99.3% of the input current step. while the 100% is an asymptotic value and will never be reached. So 5RC is usually the amount of time we consider enough to say that the inductor is fully charged.

Questions:

1)What is the purpose of RL?

Answer: To treat dehydration. to facilitate the flow of IV medication during surgery. to restore fluid balance after significant blood loss or burns. to keep a vein with an IV catheter open.

2)What is RL and RC series circuit?

Answer: An electric circuit which consists of only a resistor and an inductor either in series or parallel is known as RL circuit. An electric circuit that contains only a resistor and a capacitor, connected in series or parallel, is known as RC circuit. Energy storage. RL circuit stores energy in the form of magnetic field.

3)Why are RL circuits important?

Answer: RL circuits are frequently used as DC power supplies for RF amplifiers, with the inductor used to pass DC bias current and prevent RF from entering the power supply.

4)What are RC and RL circuits used for?

Answer: The RC circuits are used in the timing circuit, camera flashes, pacemaker etc. The RC and RL circuits are used to filter certain frequencies and it allows certain frequencies, waveshaping and timing.

5)What is impedance of RL circuit?

Answer: A LR circuit consists of an inductor and a resistor in it. Where the inductor is denoted by L an the resistance is denoted by R .

6)What is RL time constant?

Answer: The time constant of an RL circuit is the equivalent inductance divided by the Thévenin resistance as viewed from the terminals of the equivalent inductor. A Pulse is a voltage or current that changes from one level to another and back again. If a waveform's high time equals its low time, it is called a square wave.