Description of Different Types of Resistors

A resistor is a passive electrical device with two terminals that interrupts the flow of electricity in an electrical circuit. The resistor interrupts the flow of electricity in the circuit and at the same time drops the voltage in the circuit. The religion of the Resistor is called resistance. The function of the Resistor is to provide the required voltage to different components by controlling the current flow in different paths of the circuit. Different types of resistors are discussed below:

Carbon Composition Resistor

Carbon Composition Resistor
Carbon Composition Resistor

This resistor is also known as a carbon resistor. Carbon resistors are most commonly used in electronic circuits. Its main component is carbon or graphite. Composition is made by mixing graphite powder with another insulating material such as ceramic powder. This composition makes a solid cylinder-shaped rod with the material, the terminals are extracted by attaching metal caps to the two ends of this rod.

The carbon composition rod is covered with a plastic cover or coating and coded in different colors. Carbon resistors are usually much smaller. So it is not possible to write the value of resistance on it, so the value is expressed through the color code. Carbon resistor values typically range from 0.47 ohms to 20 megaohms. Its power rating is found to mean 1/10, 1/8, 1/4, 1/2, 1, 2 watts. These resistors are cheaper in the form of smaller ones and are used more in electronic circuits.

Carbon Film Resistor

Carbon Film Resistor
Carbon Film Resistor

The carbon film resistor is coated with a carbon compound on top of a ceramic bar. This coating is cut to create a spiral-shaped conduit. The resistance of the resistance Resistor of this conductive path. A metal cap is attached to the two ends of the Resistor and a color code is given on it. The temperature coefficient of this  Resistor is much lower. The value of this Resistor varies from a few ohms to a few megaohms.

Surface Mount Resistor

Surface Mount Resistor
Surface Mount Resistor

The size of the surface mount Resistor is much smaller. This Resistor is coated with a carbon compound on a ceramic base. The terminals are taken out from their two ends. It looks a lot like a chip. This Resistor has a three-digit color code. These Resistors are used on miniature circuit boards including computers, mobile phones. Their values range from ohms to kilo-ohms. Their power rating is usually from 1/4 to 1/8.

Potentiometer or Variable

Potentiometer or Variable
Potentiometer or Variable

Variable resistor potentiometer or pot (local name “volume”; it is used for volume control in radio, television, hence salesman and mechanics call it volume). Potentiometers are used in circuits where variable resistance is required. Such as volume control of radio, television, etc. A layer of the carbon film is placed on a base, this layer acts as a variable resistance. Two terminals are installed at both ends of the layer. There is a terminal in the middle that can travel from one end of the wiping contact point carbon film layer to the other end. The middle terminal and any one of the other two terminals are connected to the circuit as required.

Metal Film Resistor

Metal Film Resistor
Metal Film Resistor

The structure of a metal film Resistor is similar to that of a carbon film Resistor. It is coated with metal on a ceramic bar. This coating is cut to create a spiral-shaped conduit. The resistance of the resistance Resistor of this conductive path. A metal cap is attached to the two ends of the Resistor and a color code is given on it. Its tolerance and temperature coefficient are much lower. The value of this Resistor varies from a few ohms to a few megaohms.

Wire Wound Resistor

Wire Wound Resistor
Wire Wound Resistor

Wire end Resistors use nichrome wire, tungsten, manganese, etc. It is wound on a ceramic or cement bus. The terminals are attached to the two ends of the wire and covered with an insulating coating.

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Resistors Color Code

First DigitSecond DigitThird DigitMultiplierToleranceTemperature caress
Four Bands12 34
Five Bands12345
Six Bands123456

 

color code
Color Code