What are the classifications for specialized resistors ?

[maryzhu]

I am an electronic administrator in the field of specialized resistors. In recent days I am making an electronic project related to specialized resistors, http://www.kynix.com/Product/Cate/353.html. Today I come to this forum to turn to you to discuss my understandings on this topic are appropriate.

Here are my personal understandings:

Specialized resistance, the English name resistance, usually abbreviated as R, it is a basic nature of the conductor, and conductor size, material, temperature. Ohm's law, I = U / R, then R = U / I, the basic unit of resistance is ohm, with the Greek letter "Ω", there is a definition: the conductor with a volt voltage, the production of an amperage The corresponding resistance. The main function of the resistance is to impede the current flow. In fact, the "resistance" is a kind of property, and usually refers to the resistance in electronic products, refers to a resistor such a component. Master said to the apprentice: "find a 100 ohm resistance to!", Refers to a "resistance value" for the 100 ohm resistor, ohm often referred to as Europe. The common units that represent resistance values are kilohertz (kΩ), megger (MΩ).

There are many types of specialized resistors, usually divided into three categories: fixed resistance, variable resistance, special resistance. In electronic products, the application of fixed resistance up. The fixed resistance with its manufacturing materials can be divided into many categories, but commonly used, there are common RT-type carbon film resistors, RJ-type metal film resistors, RX-type wirewound resistors, and in recent years began to widely used chip resistors. Model name is very regular, R on behalf of the resistance, T-carbon film, J-metal, X-wire wound, is the first letter of the alphabet. In the domestic old-fashioned electronic products, often can see the appearance of the green paint resistance, that is, RT type. While the red color of the resistance, is RJ type. General old-fashioned electronic products, the majority of green resistance. why? This involves the problem of product cost, because the metal film resistors, although the high precision, good temperature characteristics, but the manufacturing cost is high, and carbon film resistors are particularly inexpensive, and can meet the requirements of civilian products.
Resistors certainly have power points. Common is the 1/8-watt "color ring carbon film resistors", it is the most used in electronic products and electronic production. Of course, in some micro-products, will use the resistance of 1/16-watt, it's much smaller. Moreover, is a micro-chip resistors, it is a member of the patch component family, previously more common in the import of micro-products, and now electronic enthusiasts can also buy (do wireless tapping?)

Ps: Excuse me if I was wrong in words or expressions as I am a green hand in the field of specialized resistors. I need continual learnings.

What is your idea ? Do you agree with my ideas ? Any of your ideas would be highly appreciated.

May someone would like to help ?

thanks in advance.