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Its normal power rating is at room temperature. For a temperature of 75 degrees, halve the rating.
Monica Abbott
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What is the Difference between carbon composition and wire wound resistors' wattage-rating?
sumthing ee
Resistors having extremely low tolerance rating are called as.?
jumper
What does this indicate about the technical rating of resistors?
"this" what... Color band, element material, size...?
How sensitive is 22k resistor?
"Sensitivity" is not a word normally applied to resistors. Characteristics of resistors include "resistance", "tolerance", "power rating", and "temperature coefficient". "Inductance" and "capacitance" are also used in describing certain critical performance resistors. A 22 KOhm resistor will require 22 v of voltage to induce a current of 1 ma. This is Ohm's Law: voltage = current times resistance.
Does adding plastic laminate to a rated fire door affect the UL rating label of the door?
Yes. The plastic laminate itself is combustible and flammable and if it is adhering to the steel door it cannot help but affect the doors temperature rating.
What is rating of resultant resistor when you add two resistors in series combination?
i dont know the aswer, please answer
When all resistors are equal value the total resistance is equal?
This depends on whether your resistors are in serial or parallel. If they are in serial, the value of the resistors just adds up, so : Val(total) = val(single) x n(umber of resistors) If they are in parallel, each added resistor lowers the total value, while the power rating rises : Val(t) = 1/ ( val(s) x n)
The rating T130 on a transformers label?
I think this refers to the continuous temperature rating, which is the maximum rated winding temperature allowed for a maximum ambient air temperature of 40deg C.
How are resistors classified on the basis of power rating?
The ability of any component part to radiate heat depends partly on the materials it is made from and mainly on its surface area. So, as large-sized resistors have a much bigger surface area than small ones, the power rating of a resistor is made according to the power (Watts) it has been designed to dissipate safely without overheating.
If you are only given 1 kilo ohms resistors with 0.5 watt power rating how can you construct a resistive load of 1 kilo ohms with 1 watt power rating?
Well...you can't. Not a load with an exact 1 watt power rating. But if you can live with a 2-watt power rating (in a circuit that would be yes--it's called derating and you do it for added life, or because you've already got the parts) you'd connect two resistors in series and set that aside, connect two more resistors in series, then connect the two series networks in parallel. Each series network is rated at 2 kilohms; paralleling the two networks brings you back down to 1 kilohm.
Do misdemeanors affect your credit?
Possessing a criminal record CAN affect your credit rating - but to what extent, is a confidential rationg factor the credit rating industry won't release.
What is a carbon film resistor?
It's exactly what is says. A resistor made of a film of carbon deposited on a substrate. Cuts are made in the film to allow generation of different resistance values. ----------- A spiral is used to increase the length and decrease the width of the film, which increases the resistance. Varying shapes, coupled with the resistivity of carbon, (ranging from 9 to 40 µΩm) can make for a variety of resistances. Carbon film resistors feature a power rating range of 1/6 W to 5 W at 70 degree celcius. The resistance ranges from 1 ohm to 10M ohm. The carbon film resistor features an operating temperature of -55 to degree celcius to 155 degree celcius. It has 200 to 600 volts maximum working voltage range. Thick film resistors became popular during the 1970s, and most SMD resistors today are of this type. The principal difference between "thin film" and "thick film resistors" isn't necessarily the "thickness" of the film, but rather, how the film is applied to the cylinder (axial resistors) or the surface (SMD resistors). In thick film resistors the "film" is applied using traditional screen-printing technology. Thin film resistors are made by sputtering the resistive material onto the surface of the resistor. Sputtering is a method used in vacuum deposition. The thin film is then etched in a similar manner to the old (subtractive) process for making printed circuit boards: ie the surface is coated with a photo-sensitive material, then covered by a film, irradiated with ultraviolet light, and then the exposed photo-sensitive coating, and underlying thin film, are etched away. Thin film resistors, like their thick film counterparts, are then usually trimmed to an accurate value by abrasive or laser trimming. Because the time during which the sputtering is performed can be controlled, the thickness of the film of a thin-film resistor can be accurately controlled. The type of the material is also usually different consisting of one or more ceramic (cermet) conductors such as tantalum nitride (TaN), ruthenium dioxide (RuO2), lead oxide (PbO), bismuth ruthenate (Bi2Ru2O7), nickel chromium (NiCr), and/or bismuth iridate (Bi2Ir2O7). By contrast, thick film resistors may use the same conductive ceramics, but they are mixed with sintered (powdered) glass and some kind of liquid so that the composite can be screen-printed. This composite of glass and conductive ceramic (cermet) material is then fused (baked) in an oven at about 850 °C. Traditionally thick film resistors had tolerances of 5%, but in the last few decades, standard tolerances have improved to 2% and 1%. But beware, temperature coefficients of thick film resistors are typically ±200 or ±250 ppm/K, depending on the resistance. Thus a 40 kelvin (70° F) temperature change can add another 1% variation to a 1% resistor. Thin film resistors are usually specified with tolerances of 0.1, 0.2, 0.5, and 1%, and with temperature coefficients of 5 to 25 ppm/K. They are usually far more expensive than their thick film cousins. Note, though, that SMD thin film resistors, with 0.5% tolerances, and with 25 ppm/K temperature coefficients, when bought in full size reel quantities, are about twice the cost of a 1%, 250 ppm/K thick film resistors.
