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If a carbon resistor increases in temperature its resistance will?
This depends on the type of conductor. If the conductor has a positive coefficient the resistance will increase. If the conductor has a negative temperature coefficient the resistance will decrease.
Most common failure in a resistor?
This depends on the type of resistor. Carbon composition and metal film resistors typically will burn open, carbon film types can short.
What is the effect on the resistance of a carbon composition resistor as the current flow through it increases?
As current flowing through carbin composition resistor increses then resistance will decrese as the function of resistance is to oppose the flow of current.....AnswerA resistor is termed a 'linear' or 'ohmic' device, which means its resistance stays constant over a wide range of current variation -in other words, it obeys Ohm's Law up to the maximum current is designed to handle. If this were not the case, then the resistor would not be suitable for many applications. The maximum current it is designed to carry, before its resistance changes beyond its tolerance, is determined by its physical size, as the larger its surface area, the more efficiently it can dissipate heat.
What type of fixed resistor is made from a compound of carbon graphite and resin bonding material?
A carbon composition resistor is made from a compound of carbon graphite and resin bonding material. This type of resistor has a cylindrical shape and is used for applications requiring high stability and low noise levels.
Does carbon have a nearly zero temperature coefficient of resistance?
Yes, carbon has a negative temperature coefficient. -0.5*10^3/C
What is the function of a carbon pile resistor in an electrical circuit?
A carbon pile resistor is used in electrical circuits to control the amount of current flowing through the circuit by adjusting its resistance. This helps regulate the voltage and prevent damage to the components in the circuit.
Why does the resistance of a thermistor decrease as the temperature rises?
Some materials have negative temperature coefficients of resistance, and some have positive temperature coefficients. Carbon is an example of a substance with a negative thermal coefficient of resistance, so it's resistance will decrease as it gets hotter.
What is a carbon composition resistor used for?
Carbon resistors can be used on an variety of electronics and are widely used today. They can withstand very high pulses of energy like that from a medical defibrillator.
What is ppm in temperature coefficient of resistance?
RESISTOR STABILITY Vs TEMPERATUREThis identifies the temperature coefficient of the resistor range. Do not confuse this with the resistor value, it relates to the composition of the resistor, be it carbon film, metal film, windwound or whatever. The term "ppm/°C" is not specific to resistors, it applies to almost every single electronic component ever produced, and is a measure of how much that component's stability will drift in response to a change in temperature. This is usually measured in terms of 'parts per million per degrees centigrade' - ppm/°C. The meaning of "parts" is the units of which that component is measured, here it is Ohms. If we were referring to capacitors the units would be farads, microfarads or picofarads etc. Oscillator frequency stability would be in terms of Hertz
What is a trimmer resistor?
A trimmer resistor usually called a trim pot is a small variable resistor it is used in circuits to do preset it is trimmed with a trimmer screwdriver it is made up with a round fiber disc with a layer of carbon with a wiper that run on the carbon layer to change the resistance it always have 3 connecting pins where the center one is connected to the wiper and the other two to opposite ends of the carbon strip.
What will be the resistance of carbon resistor having the green black colour bands?
This question cannot be answered because you did not specify the color of the third band.
What is a carbon combustion resistor?
Carbon compositionCarboncompositionresistors consist of a solid cylindrical resistive element with embedded wire leads or metal end caps to which the lead wires are attached. The body of the resistor is protected with paint or plastic. Early 20th-century carbon composition resistors had uninsulated bodies; the lead wires were wrapped around the ends of the resistance element rod and soldered. The completed resistor was painted for color coding of its value. The resistive element is made from a mixture of finely ground (powdered) carbon and an insulating material (usually ceramic). A resin holds the mixture together. The resistance is determined by the ratio of the fill material (the powdered ceramic) to the carbon. Higher concentrations of carbon, a weak conductor, result in lower resistance. Carbon composition resistors were commonly used in the 1960s and earlier, but are not so popular for general use now as other types have better specifications, such as tolerance, voltage dependence, and stress (carbon composition resistors will change value when stressed with over-voltages). Moreover, if internal moisture content (from exposure for some length of time to a humid environment) is significant, soldering heat will create a non-reversible change in resistance value. Carbon composition resistors have poor stability with time and were consequently factory sorted to, at best, only 5% tolerance.[4] These resistors, however, if never subjected to overvoltage nor overheating were remarkably reliable considering the component's size [5]They are still available, but comparatively quite costly. Values ranged from fractions of an ohm to 22 megohms. Because of the high price, these resistors are no longer used in most applications. However, carbonresistors are used in power supplies and welding controls.[5]
