# Whats the resistivity of copper?

# What is the resistance of copper wire at 90 degrees Celsius?

I`m Sorry But I`ve Given This A Couple Hours Calculating And I Have Yet To Get An Answer At 90 C Temp. Forgive Me.\n.
\n Answer \n.
\nDepends On The Length Of The Wire And The Guage.

# What is resistance?

Resistance is the opposition to flow or movement. Resistance in a a mechanical system could be friction, wind, gravity. Resistance can be opposition to a policy, or to an invasion (e.g. French Resistance). Resistance in an electrical circuit is the limiting or opposition to current flow. It is meas…ured in Ohms. ---- Electrical Resistance The technical definition is "Electrical resistance is a ratio of the degree to which an object opposes an electric current through it, measured in ohms." In simplfied terms, electrical resistance is broadly equivalent to friction in a mechanical system. If you applied a voltage to a circuit with zero resistance then you would get an infinite current. In reality all circuits have some resistance which limits the current. We can predict the current in a given circuit using Ohms law: V = I x R Where: V is Voltage (measured in Volts) I is current (measured in Amps) R is resistance (measured in Ohms) You will often see this in the form E = I x R. It is exactly the same thing, just a different convention where "E" is used for voltage instead of "V" Ohms law is: V=I/R V=Voltage (volts) I=Current (amps) R=Resistance (Ohms) Resistance in an AC circuit is called Impedance (Z) Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit. ---------- Electrical resistance is the amount that an object opposes electrical current. All things being equal (temperature, purity, etc.), resistance is a function of both its physical geometry and the resistivity of the material it is made from. Impurities in materials and fluctuation of temperature can effect the amount of resistance a material will exhibit. There are many different types of resistance, and I recommend that for starters you read up on the Wikipedia article on electrical resistance. http://en.wikipedia.org/wiki/Electrical_resistance ( Full Answer )

# How do you calculate diameter of a copper wire conductor and how do we calculate resistance of a copper wire conductor of a particaular length?

Answer .
You go to the NEC and look at the chart for developed length and the ambient temperature and the load factor and if it solid or stranded wire as stranded allows for more voltage

# How do you measure deterioration of copper amapacity or resistance as stranded copper cable heats or ages Is their a device to do this?

Answer .
The proper way to do this is to measure the voltage from end-to-end while a known current flows through it. Measuring the resistance directly is often very hard without special equipment (which does the measurement as described above).

# Whats the difference between aluminum wires and copper wires?

Copper wires are made of copper and aluminimum wires are made of aluminimum. Don't work aluminimum wiring unless you know exactly what you are doing. It will react with copper wire and wiring devices and will start a fire. There is special grease and wiring devices to prevent this that you need to… use. If you have aluminimum wire, make sure you do your homework. ------- The electrical capacity of any type of cables/wires are depending on the heat withstand capacity of the material wich can be calculated with the product of square of current, Resistance of the material and Total time for flow of current. I 2 RT. Resistance again can be calculated as R=rho*L/A where rho is the resistivity, L is the length and A is the area of cross section. So for a fixed current flow and fixed Length of wire the area of cross section of the cable is directly propotional to the resistivity. resistivity of copper is 1.68x10 power -8 and that of Pure Aluminum is 2.82x10 power -8. So.. for a specific current flow, an aluminum cable size shall be 1.7 times that of copper cable. This also is not recommented as the Aluminum resistivity varries with the alloys and even with casting. 2.5 times the size of copper can be recommented for Aluminum cables. Also as the temporature expansion of Aluminum is 3 times that of copper. So all the termination and joining areas shall be treated more sensible that of copper. No need to be afraid to use Aluminum cable if you work with the proper recommented size. ( Full Answer )

# Whats the difference between aerobic exercise and resistance exercise?

Aerobic exercise is for keeping the body flexible and in shape andis great for burning calories. It is good exercise for the heart aswell. Resistance exercise is lifting weights or using weightmachines in order to build or maintain muscle mass.

# What is resistivity?

The resisitivity of a particular material (scientifically called its specific resistivity) is measured in ohms per unit volume. It can be determined by measuring the resistance of a test conductor having unit length and unit cross sectional area or some other accurately-measured volume of the materi…al. ( Full Answer )

# Whether the resistivity of copper or its alloy is greater?

Copper alloy is often used in preference to pure copper due to its hardenss. Pure metals are usually soft and can be cut easily. They are not suitable for making any hard bodies. Therefore, alloys are used.

# What is a resistance?

Resistance is the opposition to flow or movement. Resistance in a a mechanical system could be friction, wind, gravity. Resistance in an electrical circuit is the limiting or opposition to current flow. It is measured in Ohms. Ohms law is: V=I/R V=Voltage (volts) I=Current (amps) R=R…esistance (Ohms)Resistance in an AC circuit is called Impedance (Z) ( Full Answer )

# Whats the resistivity of copper at 0 degrees?

Answer .
resistivity to what? Electrical current? Heat transfer? what kind of copper? zero degrees Celsius?

# How do you calculate resistivity of copper wire?

(rho) or resistivity of a "wire" is calculated using this formule: rho = Resistance x Area / length of material the resistivity of copper is 1.7 x 10 -8 ohm/m Resistivity is measured in ohm metres, NOT ohms per metre!

# Whats the formula equation for Copper metal reacting with silver nitrate solution to make silver metal and copper II nitrate?

If the reaction includes copper (II): Cu + 2AgNO3 yields 2Ag + Cu(NO3)2 If the reaction includes copper (I): Cu + AgNO3 yields Ag + Cu(NO3) Then spectator ions are dis regarded: 2Ag[ion] + Cu[metal] --> 2Ag[metal] + Cu[2+ ion]

# How good is copper at resisting corrosion?

The corrosion resistance of copper is great! But if the hardness was better and the strength it would be way better than titanium in some cases (not the melting point)!!!

# A piece of copper wire was cut into n equal parts these parts are connected in parallel how will the resistance of the parallel combination compare with the resistance of the wire?

The resulting resistance of the parallel combination will be the resistance of the original wire divided by n squared.

# Will an increase of applied voltage decrease the resistance of a copper conductor?

No, the resistance is fixed by the cross section and length of the conductor and does not vary with voltage.

# Does the length of copper wire affects its resistivity?

No. Resistivity is a physical constant, and is unaffected by the dimensions of the wire.

# The resistance of a copper conductor will decrease with an increase of applied voltage?

No, the resistance of a copper conductor does not vary according to applied voltage. It is constant for a given wire size, and only varies with temperature..
Of course, current through a conductor causes it to heat, so current, not voltage, indirectly causes a change in resistance.

# What has more resistance a nichrome wire or a copper wire?

Nichrome wire has such high resistance that it is used to convert electrical energy into heat. Many heating elements are made from nichrome. Copper wire has the best conductivity, for the price, of any metal.

# Whats the reaction of a zinc and copper sulphate?

u cant really do that because copper sulphate already a compound so if u already did one chemical reaction, u cant do another on top of it

# Why is copper more resistant than metals like iron?

Metals like Iron are said to be more electropositive than copper- that is they tend to react by losing electrons and forming positive ions. So the more electropositive they are the more vigorously they should react to form positive ions. A better method of determining the tendendency of a metal to… be oxidised (i.e. lose electrons to form that positive ion) is to connect a sample of the metal in a 1M solution of its ions to a Standard Hydrogen Electrode and read its Standard Reduction Potential from the High Resistance Voltmeter. Metals can then be ordered by their SRP..
Some very reactive metals like Alumio not appear to be very reactive at all because they are covered in a thin layer of their oxide, so beware! ( Full Answer )

# What would not reduce resistance in a copper wire?

Resistance will only be reduced by changing the thickness of thewire or the wire's temperature. It's apparent impedance can bechanged by placing it in an electric field as well.

# What is the electrical resistance of 18 awg copper wire?

18 AWG copper wire is equivalent to 0.75mm 2 nominal. The resistance of a particular copper wire depends on a number of factors like ambient temperature, the type and number of strands of conductor, when plated, the type of plating metal (e.g. tin, silver), etc. A good value to use for solid #18 A…WG copper is 21.8 ohms/km. Please see the useful Related Link link below. ( Full Answer )

# What ia Standard of dc loop resistance of copper cable?

It depends on the length of th cable and the diameter of the coppercable used.

# Resistance of a copper conductor will decrease with an increase of applied voltage?

Resistance is affected by the length , cross-sectional area , and resistivity of the conductor. The resistivity, in turn, is affected by temperature . So only by changing one of these four factors will the resistance of a conductor change. Changing voltage will have no affect upon the conductor…'s resistance. ( Full Answer )

# What does not reduce resistance in a copper wire?

-- winding the wire into a coil -- changing its price -- tie-wrapping it to the outside of a conduit -- shining a flashlight on it -- exposing it to loud noises -- changing the color of its insulating jacket Resistance will only be reduced by changing the thickness / physical dimensions (15 sm…all wires wound together vs 1 big one, etc.) of the wire, or the wire's temperature. It's apparent impedance can be changed by placing it in an electric field as well. ( Full Answer )

# How does the resistance of a tungsten light bulb compare to the resistance of a copper wire?

The resistance of a tungsten light bulb is greater than the resistance of a copper wire. In addition, as the bulb get hotter, the resistance increases, due to the positive resistance to temperature coefficient of the filament.

# What is the current in a copper wire that has a resistance of 4 ohms and is connected to a 9-volt electrical source?

I = E/R = 9/4 = 2.25 Ampere The wire is dissipating 20.25 watts, and is getting pretty hot.

# Does copper have low or high resistance?

It's a good conducter , but the resistance depends on the thickness of the cable .

# Whats the named of the song that in LimeWire it says resistance by muse but isn't the right song?

http://www.youtube.com/watch?v=B4l8wnKy8y4 It's by a Portuguese band called [ reckless ]. I really like the chord progression in this song. Have a nice day.

# Why does copper have a low resistance?

Because it is a metal so has lots of free electrons which when connected to a circuit detach from the atoms and move around the circuit. This produces a high current, so resistance will be low as current is high.

# Is copper has low resistivity or low resistance?

Copper is a material - although you can make objects from it. Resistivity is a property of materials. Resistance is a property of objects - it depends on the resistivity of the material the object is made of, the shape and size of the object, and also of where you connect to take your measurement.… With all this in mind: Copper has a low resistivity. Copper objects tend to have low resistance compared to other objects of similar shape and size made of materials with a higher resistivity You can still achieve quite high resistances with a long enough piece of very thin copper wire. ( Full Answer )

# From copper and manganin which has higher resistance?

The question is actually wrong, they can both have the same resistance if configured differently, the real question should be which has a higher resistivity which is the electrical resistance found in a standard amount of each material. In this case Manganin has a higher resistivity than copper.

# Does copper or iron have a lower resistance?

Copper is second in conduction only to silver, but as silver oxidizes (forms a non-conductive layer) easily, copper is considered the most practical conductor. As conduction is essentially the opposite of resistance, copper has a lower resistance than iron.

# Will the resistance of a copper conductor decrease with an increase in the applied voltage?

If all environmental conditions remain constant then the resistance will not change appreciably with applied voltage, but the current will increase. An increase in current will raise the temperature of the conductor which will increase the resistance somewhat.

# What length of a copper wire 0.800-melimmeter in diameter has a resistance of 100 ohm?

Work it out for yourself. The equation you will need to use is: resistance = resistivity x (cross-sectional area / length) Manipulate the equation to make 'length' the subject, and use 17.25 x 10 -9 ohm metres as the value of resistivity.

# What doesn't affect the resistance of a uniform circular copper wire?

Is either; A. the length of the wire B. the diameter of the wire c. the location of the wire D. the temperature of the wire

# How electrical resistance can be measured in copper and aluminium?

Same as for any other substance: Apply a voltage and measure the current flow. (Resistance equals voltage divided by the current flow.)

# What is an alloy of copper and nickel used in electrical resistance wire?

Alloy wires of copper and nickel come in many varieties and are sometimes called cupro-nickels. They can be found containing: .
Copper with 10% nickel .
Copper with 30% nickel .
Copper with 25% nickel with 0.05-0.4% manganese .
Copper with 45% nickel (also known as constantan) Alloy wire… containing both copper and nickel retain their strength at elevated temperatures compared to copper alloys without nickel. Also, they are beneficial in outstanding resistance to corrosion, particularly from sea water. ( Full Answer )

# 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 the specific resistance of copper and aluminum?

The specific resistance of copper is 1.678 microohm-cm and for aluminium it is 2.650 microohm-cm

# Does copper have a higher resistance to electron flow than aluminum?

No, copper has a lower resistance to electron flow than aluminum for a given cross sectional area. So if two cables have the same diameter, the copper one will conduct electricity better than aluminum. However, an aluminum cable of the same weight as copper will conduct electricity better than cop…per. It is for this reason that aluminum is often used for overhead transmission lines, resulting in a lower weight than similar performing copper cable. ( Full Answer )

# What length of a copper wire 0.800-mm in a diameter has a resistance of 100 ohm's?

R = rho * L / pi r^2 So L = pi r^2 R / rho r = 0.400 X 10^-3 m R = 100 ohm rho = to be noted in a data book Plugging these known values we can compute the value of length in meter'

# Can copper and alluminium wire of same length and diameter have same resistance?

No, there'll be a difference in resistance. Aluminum has moreresistance than copper does, although it still a low resistancewire.

# Why doubiling the radius of a copper wire leads to decreasing its resistance to one quarter?

If you double the radius of a wire then its cross-sectional areagoes up by a factor of four. Put in the simplest way, this meansthat there's four times as much space for electrons to flow alongthe wire, hence one quarter the resistance.

# Does a short copper wire have more resistance then a long one?

No. Other things being equal, a long wire has more resistance than a short wire.

# What is the resistance of a 3.5 m length of copper wire 1.5 mm in diameter?

Resistivity of Copper = 1.68x10^-8 radius of wire = 1.7x10^-3m/2 =8.5x10^-4 A =pi*(8.5x10^-4)^2 = 2.310^-6m^2 Plugging in thenumbers: R = 2.6x10^-2 = .026 Ohms

# What is the resistance of a 6 000 foot piece of 1 0 copper wire?

The answer depends on the cross sectional area of the wire. This is not given.

# Which copper wire would have the highest resistance?

The electrical resistance of a material is proportional to its length, and inversely proportion to its cross-section. So a long thin copper wire would have the greater resistance.

# Can we construct two wires of same length one of copper and one of iron that would have same resistance at the same temperature?

For a single temperature, yes. The copper wire will have a much smaller cross-section than the iron wire. For multiple temperatures, no. Copper and iron have different temperature coefficients for resistivity.

# What is more resistant (in terms of electricity) copper or aluminium?

Aluminum is a little more resistive; copper is the betterconductor. However, aluminum is a lot cheaper. However, silver is more conductive than copper, and gold is evenbetter. But those metals are FAR more expensive than copper oraluminum. We can achieve the same conductivity by using a thickeralumi…num wire, and still have a lower overall cost. ( Full Answer )