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ខែមករា 3, 2017

អំពីអ្នកប្រឆាំងនិងប្រភេទរបស់វា។

អំពីអ្នកប្រឆាំងនិងប្រភេទរបស់វា។

Significances of Resistors:
This is a passive two-terminal electrical component that implements electrical resistance on a circuit. They are used in heating and lighting applications. They help control the amount of current in a circuit. Electronic circuits are composed of resistors, transistors, capacitors, inductors and diodes. With all the individual components joined together, electronic circuits are able to perform complex operations. Signals can be amplified, computations can be performed and data can be moved from one place to another. They play a crucial part in the function of electronic components. A high resistance means that there is less current available for a given voltage. The way of this function is by turning electrical energy into heat. The way they are able to turn heat into energy is by the collisions between the electrons and ions inside of them when they are carrying current. They convert electrical energy into heat in components such as irons, toasters, heaters electric stoves, hair dryers and almost all forms of electronic construction.

Most common and readily available types:
There are many types of resistors but the following resistors are the most common:

Carbon resistor– The most common type of this are carbon resistors that are almost used for any general purpose and are relatively inexpensive. They are called carbon resistors because they are composed or made up of carbon. They are made in different sizes and with different power dissipation limits. The most common types of resistors range from 1 to 1/8 watt.Film resistor– They have a higher tolerance than do composition type resistors. They react much more sensitively within the electronic components they are used in. Some manufactures that carry films are American Technical Ceramics, Arcola, BI Technologies, Bourns, Caddock, Panasonic and Parallax. The different types of film resistors are:Carbon film resistors, metal film resistors, planar resistors, thick film resistors, and Thin film resistors.Wire bound resistors– They are very similar to film type resistor. They are constructed by wrapping a piece of metal wire around a piece of insulated ceramic. The use of wire bound resistors is for high temperature and high rate of power.

All are color coded so it makes it easier to be red. The color coding indicates what this is cable of doing. The bigger that have the tolerance value of resistance and the rating of wattage printed on the side. Smaller resistors show what they cable of doing by the color.

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