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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.
What is rigidity modulus of steel wire?
it is 14.67n/m3
What are the properties of constantan wire?
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.
Is there nickel in copper wire?
Generally not; but copper-nickel alloys are very known and used (for examples thermocouples with constantan).
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 is constantan wire?
Constantan is a metal alloy made of 45 percent Nickel and 55 percent Copper.Constantan wire is used chiefly in electrical instruments and and other equipment which can take advantage of its unusual physical property which is that, even over wide variations in operating temperature, its electrical resistance stays at an almost constant value.
What is the value of the rigidity modulus of the brass wire by usiny torsion pendulum?
960
What is the resistivity of the constantan?
6.048 ohm meters
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
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.
Where is constantan used?
In many typical installations, it is used in strain gauges.
Name two alloys of copper?
Examples: brass, bronze, constantan.
