Resistors

Resistance is the body contains material resistant to electrical current, have at least two parties and may have up to 16 party
According to the material of which the resistance varies performed and used
Known resistance value, the ability watt, accuracy%, type or severity of industrialization, the form and we will address the status of each individual
Format: There are several forms of
Party 2: All resistors have a fixed value of the parties, or parties either two-wire welding directly to or Albordh Arutin welding and capacity large screws ligament.
Some contain resistors Fuse inside
Resistors with a capacity greater than 3 Watt change in the shape where placed inside the protective ceramic or damage to it from outside as resistors provide 25 watts or more sometimes chiller bronze metal
3 party is usually a variable resistance or voltage breaker and the third party is a slider (variable) and 4 of them where the party will be the fourth party is a fixed percentage addition to the variable
The parties most be a set of resistors Resistor Pack inside the body and each one contains 4 or 6 or 8 resistors have a joint party and form Kalmct and some are just like a group not connected to the integrated circuit IC and the resistors are contiguous
Ability
Values ​​are 1 / 8, 1 / 4, 1 / 2, 1, 3.5, 7, 10.15 etc. for the resistors with a wire connection
Smaller resistance welding without limbs and on the surface Surface Mount to begin from 1 / 16 to 1 Watt
Resolution:
In the past have been made accurately 20% but now up to 10% resistors are rare and mostly 5%
Resistors are precision 2% and 1% but less presence and a higher price and you can ask for 0.5% or better
Value
There is a standard resistance values ​​on the basis of the accuracy of 10% do not expect to find what we want, but you can assemble values ​​Central. These values ​​will be remembered from 10 to 99 and the remainder implications of these values ​​× 10 ÷ 10 or so
10 11 12 13 14 15 16.5 182 022 242 730 333 639 434 751 566 168 758 291
It remains to be talking about the substance manufacturing
There are resistors with temperature coefficient negative any decrease high temperature (based Carbon) and another with a coefficient of thermal positive any increase high temperature (base metal) and trying to studies to reduce these transactions to the values ​​do not remember and some made specifically for the show this property and make it more systematic use Khsasat of heat such as the BT100 with a coefficient of thermal positive and there are species with a negative coefficient of thermal made of semiconductor
Carbon resistors
And made of Carbon composite cylindrical shape and is suitable for large values ​​which is also a source of noise and Alchocrp so it does not fit the initial stages of the zoom
Carbon film resistors
Manufactures paint template Bmakhlut Carbon Ceramic and after the drought could be carving a spiral path for higher values, the same advantages and disadvantages as before
Metal film resistors
Are made by evaporating the desired metal and the intensification of the ceramic mold, a very best in terms of properties and less noise for that used in the initial stages of the zoom
Resistors wire coils
High-resolution and the noise of a few and capacities (TAP) is great but flawed that it does not fit the frequencies high similarity of shape files is behaving as at some frequencies, and then happens to them ringing when increasing the frequency and then turn to the capacitor at higher frequencies just a circle ring parallel and when buying cite this frequency Self properties in Resonating frequency
Carbon film resistors suffer less from this phenomenon and the best of metal film resistors
In the case of circuits that avoid these properties circles VHF, expressly provides resistance-free induction non inductive resistor which is made specifically for such