What are the carbon composition resistors?
carbon composition resistors are used to ensure electrical resistance and restrictions in the circuit. The resistance value is measured in the ohms and the amount of current flowing through the circuit may be determined by dividing the known voltage of the ohm of the resistance. By resistor, the current control provides protection for more sensitive components in the circuit.
All resistors are considered passive electronic components. This is because the resistor consumes energy but does not create energy gain or own energy. Instead, it converts the energy consumed into heat and distracts this heat into air.
Since the first 20th century, few changes have been created in the design of the carbon composition. One of the most significant changes is the insulation that now surrounds the carbon core. In the resistors of the early carbon composition, this core was revealed and the wires were soldered directly by the component. Modern carbon composition resistors have improved this design using a ceramic or plastic outer layer that protects theST before damage.
These electronic components were widely used until the 1970s, when they began to produce more reliable and cheaper options. Since then, the resistor of the carbon composition has largely been replaced by a metal film, foil and other types of resistors. While carbon composition resistors are useful for providing current controls in uncritical circuits, this type of resistor is subject to a number of factors that can cause resistance to changes, including high temperatures, excessive voltage and humidity. All these factors can create significant changes in the actual resistance provided by the component, which is unsuitable for the exact electronic device.
Modern carbon composition resistor is available in Ratings Resistance ranges from mere fractions of ohm to 22 meg ohms. Thanks to this wide range of resistance values compared to a small component sizeCarbon carbon universal part for high current electrical designs. If precise current specifications are not required, for example in welding equipment and power units, these resistors can provide long -term and reliable solutions within 5% tolerance of resistance evaluation.
The resistance of the resistors of the carbon composition is displayed in the color -coded set of painted rings on the outer surface. The first two belts show the first two numbers of the resistor value. These two numbers are then multiplied by a force of ten, which is marked with the third belt. The tolerance or edge of an error for the resistor is displayed on the fourth zone.