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In many typical installations, it is used in strain gauges.
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What is a copper-constantan thermocouple?
A thermocouple is a temperature sensor made from two different types of metal. Different metal types give different sensing properties and ranges. Several standard pairs of metals are defined in industry and designated by a letter. A copper-constantan thermocouple is "Type T."
What is constantan wire used for?
In essence it is used in applications where it is important that the resistance of a length of contantan wire doesn't change with temperature. As a student the only time I've ever needed this feature is in experiments involving measuring resistance. A use for constantan wire is in DC Current Shunts. This is a precision low value resistance placed in series with the load in a direct current circuit that is carrying high current. By measuring voltage drop across the shunt, we can measure the current. In this application it is important that the resistance of the shunt does not vary with temperature (the shunt will heat up under full load) otherwise the accuracy of the current reading is compromised. Typically the resistance of the shunt is set to give 60 millivolt voltage drop across it at full current.
How the resistance of conducting material vary with temperature?
Well, there's typically two types of materials-Those with positive temperature coefficient and those with negative temperature coefficient. Positive temperature coefficient are those whose resistance increases as temperature increases. Negative temperature cofficient are those whose resistance decrease when the temperature increase. There are however some alloys such as Manganin& Constantan whose resistance is not affected by temperature
What were the earliest windmills used for?
they were used for capsureing windthey were used for capsureing wind
What was irrigation used for?
irrigation was used for watering crops and was occasionally used for drinking.
What is the resistivity of the constantan?
Constantan is a metal alloy made of 45 percent Nickel and 55 percent Copper, used chiefly in electrical instruments because of its constant resistance under variations of temperature.
Why is constantan better than copper?
Better for what? Usually one material is better for some things, other materials for other things. The special feature of constantan is its low temperature coefficient for electrical resistance.
Why are alloys constantan and Manganin used to make standard resistors?
They are used to make standard resistors because 1)they have high value of resistivity.2)temperature cofficient of resistance is less.3)they are least affected by temperature.
What is an alloy of copper and nickel used in electrical resistance called?
cupro-nickel is the term referring to copper / nickel alloys. The particular alloy used in electrical resistors has 45% nickel, and is called constantan. See related link.
What is a copper-constantan thermocouple?
A thermocouple is a temperature sensor made from two different types of metal. Different metal types give different sensing properties and ranges. Several standard pairs of metals are defined in industry and designated by a letter. A copper-constantan thermocouple is "Type T."
What is a constant wire?
Constantan wire is a resistance-wire made of 42% nickel, 1.25% manganese, 0.25% iron and the rest is copper. It is mainly used in making wire-wound rheostats and potentiometers in electrical circuits.
What kind of metals are used to make thermocouples?
There are a variety of metal pairs that are used to make thermocouples. Two common pairs are chromel-alumel, known as type K , and copper-constantan, known as type T. A good reference is Omega Engineering (omega.com) or azom.com.
What is a J-therma?
Assuming you mean a J-Type thermocouple... A thermocouple is a junction between two different metals that produces a voltage related to a temperature difference. The voltage produced by thermocouples is very small and non-linear. A J-Type thermocouple is iron-constantan, and has a range of about 200-1400°F (95-760°C). The Iron is the positive (+) conductor and has a white insulator. The Constantan is the negative conductor (-) and has a red insulator.
What is constantan wire used for?
In essence it is used in applications where it is important that the resistance of a length of contantan wire doesn't change with temperature. As a student the only time I've ever needed this feature is in experiments involving measuring resistance. A use for constantan wire is in DC Current Shunts. This is a precision low value resistance placed in series with the load in a direct current circuit that is carrying high current. By measuring voltage drop across the shunt, we can measure the current. In this application it is important that the resistance of the shunt does not vary with temperature (the shunt will heat up under full load) otherwise the accuracy of the current reading is compromised. Typically the resistance of the shunt is set to give 60 millivolt voltage drop across it at full current.
Swamping resistor is made up of?
Swamping resistor is mostly made of manganin or constantan because these materials have temperature coefficients very close to zero thus there is a very less change in the resistance of these materials with change in temperature.
What do you expect of ohmic resistance as you increase or reduce temperature?
It depends. In general, pure metal conductors increase in resistance as their temperature increases; some alloys (e.g. constantan) are manufactured to maintain an approximately-constant resistance for changes in temperature. Materials such as carbon (and most insulators) exhibit a fall in resistance as their temperatures increase.
Atomic explanation as to why a piece of constantan wire with a large diameter has a smaller resistance than a piece of constantan wire with a small diameter?
The larger the wire the more atoms there are to transfer the electrons through the wire. Induced electrons from a power source bump other electrons out of the orbit of the wire atoms thus causing electrons to flow and the induced electrons fall into the orbit of the wire atom until the next loose electron knocks that one out of orbit to the next atom and the next one etc.. It's like a one way game of bumper cars until the electrons get to the end of the wire and into the next conducting substance. This is also the difference between an insulator and a conductor that is how freely an atom gives up its electron when its bumped.
