what is Resistor

A resistor is an electrical componenets that limits or regulates the electrical current in an electronics  circuit.we can say also that a resistor is an electrical components that limits the flow of electrical current.......
                       The resulating current is inversely proportional to the resistance. This is defined in ohm's law ,which states that the current(I) is equal to the voltage (V) divided by the resistance (R).
                                 
                                                                      I= V/R

If too little current is flow in component, it may not operate.If too much current is allowed through, it can damage the component.Therefore resistor play an important role in an electronic circuit.
Sevral type of resistor exist ,but most are made of carbon and an insulating matrial,such as ceramic.

NOTE:- Resistor are represented in circuit diagrams by jagged line.They are usually labeled R1,R2,R3 ect.