What is an Electrical Resistor?
A resistor is a passive component in a circuit which provides resistance to the flow of current. There are many different types of resistors.
These resistors vary in their construction, power dissipation capacities, and tolerance to various parameters (such as temperature and light). The types of resistors include:
1.Carbon Composition Resistor
2.Thermistor
3.Wire Wound Resistor
4.Metal Film Resistor
5.Carbon Film Resistor
6.Variable Resistor
7.Varistor
8.Light Dependent Resistor
Carbon Composition Resistor
A carbon composition resistor (also known as a carbon resistor) is a commonly used resistor. These resistors are low cost and are easy to construc
Carbon resistors are mainly made of carbon clay composition covered with a plastic case. The lead of the resistor is made of tinned copper.
The main advantages of these resistors are that they are readily available, low cost, and they are very durable.
These resistors are also available in a wide range of values, from as low as 1 Ω to as high as 22 Mega Ω. For these reasons, carbon composition resistors are often included in many of the best Arduino starter kits.
The main disadvantage of carbon composition resistors is that they are very temperature sensitive. The tolerance range in resistance of carbon composition resistor is of ± 5 to ± 20 %.
Although this is not a concern for the majority of electronics projects one would experiment with at home.
This type of resistor has a tendency to produce some electric noise due to the passage of electrical current from one carbon particle to others.
Where low cost is the main criterion for designing a circuit rather than its perfection of performance, these resistors are normally used.
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