Circuit Elements

In my last post I have given an introduction about this blog and some content related to network elements. And in today's post I am going to give you a brief explanation about the main circuit elements.They are
1.Resistor
2.Inductor and
3.Capacitor

1.Resistor: What is a resistor?...
Before going to know about resistor , you should know the property called RESISTANCE.
Resistance is the property of a material by virtue of which it opposes the flow of electrons through the material.
It is clearly explained by Ohm's law.

Ohm's law:
At constant temperature , the current through an conductor is directly proportional to the applied potential difference across it.
            
              R= V/I
        UNIT: OHM.
Let us suppose  electric current is flowing through the conductor, heat is generated with in the conductor due to collision of free electrons with atoms.
From this we can say that energy lost in the conductor due to resistance is in the form of heat.

2.Inductor:
To understand the concept of inductance you should know some basic electromagnetism principles.

If a wire of finite length is twisted into a coil a simple inductor is formed.

If an amount of current flows through the coil , an electromagnetic field is formed. With any change of flow of current ,electromagnetic field also changes and with the change of field emf will be induced in the coil.

Inductance is the property of a material by virtue of which if opposes any change of magnitude or direction of current passing through the conductor.
     Unit: Henry.
Inductance is denoted by L.

Capacitor:
Capacitor is a circuit element which has the capability to store electric charge with in it.
It stores the electrical energy in the form of electric field by the two polarities of charges on the two electrodes(capacitor plates).

Capacitance can be defined as the charge per unit voltage.
                 C=q/v.
Unit of capacitance is Farad F.
Important point.
Where as in resistor ,it dissipates energy in the form of heat but in an inductor and in a capacitor they store energy but never dissipate.