Copper wire Definition and 96 Threads

Homework Statement A copper wire is 9.00 m long and has a cross-sectional area of 1.00 10-4 m2. This wire forms a one turn loop in the shape of a square and is then connected to a battery that applies a potential difference of 0.100 V. If the loop is placed in a uniform magnetic field of...

Homework Statement Find the resistance of a 1.4 m length of copper wire with diameter of 5*10^-3 m.Homework Equations R = p(L/A) where p = resistivity of copper, L = length, A = areaThe Attempt at a Solution The resistivity of copper is (1.69 * 10^-8). Radius is d/2 (5*10^-3) / (2) =...

I am trying to figure out how to program a 528 hz signal to emit and amplify through a copper wire coil

Homework Statement You have 2 magnets separated by a distance. The top magnet has its south end facing the north end of the other magnet thus forming a magnetic field. Finally you insert a loop of copper wire (the pic shows a copper tube though) between the two magnets with the open ends...

Homework Statement A 1.0 cm copper wire of diameter 0.10 cm carries a current of 50.0 A to the east. Suppose we apply to this wire a magnetic field that produces on it an upward force exactly equal in magnitude to the wire's weight, causing the wire to "levitate." What are the field's...

Hello All, I am trying to do some research to see how many known magnetic effects (related specifically to conductors) have been discovered. So far, I know of the most common one, The Lorentz Force, which is due to the effect of an electromagnetic wave moving across a wire. I am specifically...

Homework Statement A copper wire with cross-sectional area S=2.5 mm^2 is bent to make three sides of a square frame that can pivot about the axis 00' as shown below. The wire is located in a uniform vertical magnetic field B. If upon passing a current I=16 milliAmperes through the wire, the...

Homework Statement 1. The wiring in a house must have low enough resistance so that it does not heat up too much while current is flowing. A particular copper wire needs to carry 20 A of current, and it must not dissipate more than 2 watts of power per meter of length. The resistivity of...

A copper wire is in the form of a cylinder and has a resistance R. it is stretched till its thickness reduces by half of its initial size. Find its new resistance in terms of R.

Suppose you wish to fabricate a uniform wire out of 1.0 g of copper (Density of copper is 8.93 x 10^3 kg/m^3). If the wire is to have a resistance of R = .5 ohms, and all the copper is to be used, what will a) the length and b) the diameter of this wire? this has me tottally confuzed...

I'm wondering if it make much difference if they used silver instead of copper wire in electric generators? Also, how does switching from silver to copper wire affect the voltage and current, or does it just create some resistance?

Is the fibre optic cable cheaper than copper wire for transmission? I believe there is still loses in a fibre optic cable. As the critical angle of glass is 42 degrees, thus about 50% of the signal would be lost. Is that true?

A diagram shows a flexible copper wire attached to the terminals of a dry cell. A strong circular magnet, 12 mm in diameter, is attached to the side of the cell. The interaction between the current in the wire and the magnetic field of the magnet causes the wire to levitate i.e. _____+ l...

Homework Statement (a) Copper has a breaking stress of about 3.00×108 N/m2. What is the maximum load that can be hung from a copper wire of diameter 0.37 mm? (b) If 17 percent of this maximum load is hung from the copper wire, by what fraction of its original length will it stretch? Homework...

We have a formulae to find energy contained by an EM wave, which finds energy per unit volume. Also says it is equally distributed between E and B fields. How do we find EM energy for an EM wave of 50Hz in a copper wire? Because it is low frequency, instead of space we guide by conducting...

Homework Statement What is the actual value for the young's modulus of copper wire in N/m?Homework Equations The Attempt at a Solution

Homework Statement The top wire is 1.00 mm diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current flow through the two bottom wires is 95 A in each. Calculate the required current flow in the suspended wire. Homework...

Homework Statement A 10 ohms Nichrome resistor is wired into an electronic circuit using copper leads (wires) of diameter 0.6 mm with a total length of 50 cm. The additional resistance is due to the copper leads is 0.03 ohms. What change in temperature would produce a change in resistance...

Hi all, I am planning some electrical installation in my home and I am not sure about the norminal current that the wire can tolerate. can any give me the ref table or some link of that, I mean for certain diameter (mm), the wire can bear a current (amp). Thanks

I'm not sure if this question belongs in the forum or the physics forum, I guess I'll post it there as well. I'm trying to calculate the temperature rise in a coil of wire (27AWG) wound around a toroid. The current through the wire is ~0.5A with a calculated voltage drop of 14.64mV across the...

Homework Statement Calculate Youngs Modulus for the copper wire We have done the experiment today, here is the data: (KG)/F(N)/x(M) 0.1/0.1g/0.0 0.2/0.2g/0.0 0.3/0.3g/0.001 0.4/0.4g/0.001 0.5/0.5g/0.002 0.6/0.6g/0.003 0.7/0.7g/0.004 0.8/0.8g/0.005 0.9/0.9g/0.006 1.0/1.0g/0.009 1.1/1.1g/0.029...

Homework Statement I am stuck on a HW problem. A square loop of copper wire falls out of a side 'a' and radius 'r' falls outside of a magnetic field 'B'. How does one find the terminal velocity? B = 1.2T a = 5cm r = 1mm Please help me set up this problem so I can solve it and figure out...

Homework Statement i need to find the radius of a copper wire given the following data: resistivity is 0.25 ohm meter length of wire is 200 m Homework Equations roe=RS/I roe=resistivity R= resistance of material S=cross sectional area I= length of specimen The Attempt at a...

Homework Statement what is the resistance of copper wire in this situation? 200 meters long strand of wire, with a resistivity of 0.625x10^-6 Homework Equations im not sure if this is the right equation but: resistance=resistivity x length/area The Attempt at a Solution this is the...

Homework Statement Copper can be drawn into thin wires. How many meters of 34-gauge wire (diameter = 6.304 x 10^-3 in) can be produced from the copper in 5.01 lb of covellite, an ore of copper that is 66% copper by mass? (Hint: Treat the wire as a cylinder. d of copper = 8.95 g/cm^3)...

Homework Statement A square loop, 5.3 m on a side, is made of copper wire, 0.9 mm in radius. A 3.2 T magnetic field, perpindicular to the loop is increasing at the rate of 0.29 T/s. The resistivity of copper is 1.7 x 10^-8 ohm*m. Find the induced current. Answer in units of A. Homework...

Hey all, I was wondering about a varied version of something. I know that if you run a magnet up and down a tightly coiled tube of copper, it creates an electric current through the wire. I also know the reverse, which is that if you passed a current through that wire, while it was wrapped...

[SOLVED] Find the diameter of copper wire Homework Statement Find the diameter of copper wire which has the same resistance as an aluminum wire of equal length and diameter 1.2mm. The reactivities of copper and aluminum at room temperature are 1.7x10^-8Ωm and 2.6x10^-8Ωm respectively. Can...

[SOLVED] Hookes law equation for all gauges of copper wire Homework Statement For my coursework I'm trying to find an equation using hookes law that works with all gauges of copper wire, i know that this means i will have to change the hookes law equation from F=ke to F=ake (a is not the area...

Question Details: In the figure the top wire is 1.1 -diameter copper wire and is suspended in air due to the two magnetic forces from the bottom two wires. The current is 50 in each of the two bottom wires. Calculate the required current flow in the suspended wire. i have been working...

Hi all, Biologist posting here. We have a thermal gradient that doesn't seem very stable. Right now, our setup is the following: hot water runs through one aluminum bar and cold water runs through another. the two bars are about 25cm apart. There is a thin aluminum plate resting on the...

Okey, I have a problem now. I´m suposed to sketch a graf of how long range on a copper wire some different speeds have ex 256 kbit/s etc. I have 225 channels of each 4kHz and it can transfer 4000 symbols/sec. The effect on each channel is 0.1mW and the noise is -100dBm. The signal is...

Hi there! Can anyone help me with a problem. I did an experiment at school trying to measure the Young's modulus of a copper wire. We attached one end of the copper wire to a clamp and then tied on weights of 100g at a time to the other end so that a force can be applied to the copper wire...

A piece of copper wire has a resistance per unit length of 6.40e-3 ohm/m. The wire is wound into a thin, flat coil of many turns that has a radius of 0.190 m. The ends of the wire are connected to a 12.0 V battery. Find the magnetic field strength at the center of the coil. R/L = 6.40e-3...

A copper pipe has an inside diameter of 6.720 cm and an outside diameter of 8.000 cm. What length of this copper pipe will have a resistance of 8.05 × 10-3 W? so i am using the equation R=rho(L/A) A=pi(d2-d1)^2/4 which is 1.29E-4 m and for copper rho is 1.7E-8 so...

A piece of stiff copper wire hangs from a metal between the jaws of a u-shaped magnet and its free end dips into a pool of mercury. Mercury is connected to a positive terminal. piece of stiff wire will move: A towards the south pole B towards the north pole C to the right towards the support...

Hello: I am having trouble starting this problem. "20.0 m long copper wire, 2.30 mm in diameter including insulation, is tightly wrapped in a single layer with adjacent coils touching, to form a solenoid of diameter 2.50 cm. What is the field at the center when the current in the wire is 26.0...

I'm really stuck on this one problem: "A small but measurable current of 4.20E-10 A exists in a copper wire whose diameter is 0.02 cm. Calculate the electron drift speed (in meters/second)." Source: Serway and Jewett I know that: I = 4.20E-10 A n = 8960 kg/m^3 q = 1.6E-19 C d = 2E-4...

Hey, this is a great 1 minute long video showing you how to make a homopolar motor using just one AA batter, a copper wire and a magnet. ENJOY! http://www.spikedhumor.com/articles/90173/Homopolar_Motor.html

in a recent chemistry experiment at school, two voltaic (galvanic) cells were set up with the same solutions in either beaker (one being Copper Sulfate, and the other was another metal solution) anyway, one had a potassium nitrate salt bridge, the other a copper wire salt bridge... sooooooooooo...

1.Why is a copper wire was used in a solenoid rather than a iron wire ?

Hello guys. I gave this one the good ol effort and seem to have gotten stuck. Can anyone help? ----------- A copper wire with a circular cross-section area of 1.5 mm2 carries a current of 11 A. The resistivity of the material is 2.1 × 10-8 ·m. a) What is the uniform electric field in the...

A piece of copper wire is formed into a single circular loop of radius 12 cm. A magnetic field is oriented parallel to the normal to the loop, and it increases from 0 to 0.55 T in a time of 0.45 s. The wire has a resistance per unit length of 3.3*10^-2 ohms/m. What is the average electrical...

What is the maximum load that could be suspended from a copper wire of length 1.9 m and radius 1.2 mm without breaking the wire? Copper has an elastic limit of 2.9 x 10^8 Pa and a tensile strength of 4.3 x 10^8 Pa. Give your answer in Newtons (N). Any thoughts? I'm completely lost.

i'm having this ridiculous argument over at: http://www6.head-fi.org/forums/showthread.php?t=144514&page=1&pp=20 where we are having a not so friendly disscusion of wire burn in. basicly my question is this does regular copper wire change it's sound if get's "burned-in" over time. now I'm...

hi, sorry if this is in the wrong section, but I am new to the forum! Im doing an A2 physics investigation, and have pretty much completed it all, an got a good set of results, but i need to prove that they are right! i have been using a simple set up by applying a 0.5A current through a...