A resistor is an electric component that is used to limit the flow of current in an electric circuit. It is basically a resistive component. It has two terminals and is used in almost all electric circuits. It can also be sued to adjust signal levels and terminate transmission lines. There are different types of resistors available each meant for a specific purpose. A varistor is one such type of resistor, used to change the resistance in the circuit by changing the voltage. Its design is almost … [Read more...]