Resistor construction resistors are components used to resist the flow of electric current and have a stated value of resistance. The resistor is the passive circuit element which opposes the flow of. Resistor hair in pipe same flow large r higher pressure lower pressure small r thehydraulicanalogycompareselectriccurrent. It is a device that we dont see but the fact is that without resistors electronic equipment is useless and wont work at all. The ohmic value of these types of resistors is 1 ohm up to 200k ohms or more and can be operated safely up to 350c. The resistor values are changed with the help of the temperature and applied voltages are called linear resistors. These resistors are cheap and reliable and stability is high. Light dependent resistors or photoresistors change their resistance with the level of light. In short, a resistor is an electronically device that controls the flow of electricity in a circuit. Different types of resistors with pictures,function and uses. If the resistance of the current value is directly proportional to the applied voltage is called the linear resistance. The two main characteristics of a resistor are its resistance, r, in ohms and its power rating, p, in watts.
The resistive material is of carbonclay composition and the leads are made of tinned copper. Updated explain the different types of resistors pdf. The wattage rating indicates the amount of power the resistor can safely dissipate as heat. Whilst the majority of resistors are standard fixed resistors or variable resistors, there is a number of other resistor types that are used in some more niche or specialised applications. Many types of resistors are used having different uses and construction.