Wire Definition and 1000 Threads

Homework Statement A .1in aluminum wire is being pulled from a coil between 2 1in steel rollers. One roller is fixed to the driving motor while the other roller is loaded with a force to provide traction. What is the maximum force that can be applied before the wire is plastically deformed by...

Homework Statement A wing on a light aircraft experiences an upward thrust of 10 kN. This is counteracted by two steel wires each set at an angle of 30 degrees from the horizontal and of length of 4 meters. The diameter or the wire is 10 mm, and Young's modulus for steel is 2.05*10^11 N/m^2...

Homework Statement Homework Equations ƩxiLi=0 The Attempt at a Solution Using geometry to find the lengths and rotating so AB is horizontal, I have: ƩxiLi=0: [((64/80)*L)/2]*L + (-64/2)*80 + (-14/2)*100 = 0 L = 90.28mm

Homework Statement A wire 42.1 cm long carries a 0.660 A current in the positive direction of an x-axis through a magnetic field with an x component of zero, a y component of 0.000330 T, and a z component of 0.00840 T. Find the (a) x, (b) y, and (c) z components of the magnetic force on the...

Homework Statement A number 12 copper wire has a diameter of 2.053mm. Calculate the resistance of a 31m long piece of such wire. Use rho=1.72x10-8 Ohm-m for the resistivity of copper. Homework Equations This is the part that I am unsure of, all of my equations for resistivity do not...

talking to someone about direct tv systems, how they talk between HD boxes over the rg6 coax line one person said one part sends a signal and it travels down the center of the center coax conductor and another signal going the other way travels down the outer part of the conductor, the surface...

Homework Statement I came across this questions in one of the online entrance tests,so i do not remember the exact values,I remembered the arrangement. ________________ |... |...| |... A...C 2v...|--------| (Please ignore the dots,they are to prevent...

The steel wire can withstand strong tensile stress, but when the steel wire is being coiled into a spring it can be an elastic spring. Why is this? Can this be proven mathematically?

Homework Statement An elastic wire has the folowing charcteristics:initial length l_0=60cm,section S=6mm^2,Young's Modulus E=\frac{12MN}{m^-2}.Initially the wire has both ends fixed. Its initial position is horizontal, untensioned. At the middle of the wire it's hanged a body that produces an...

I know that electrons flow across the wire from the source to the receiver, but would it be possible to keep these electrons on the wire after disconnecting the source and receiver?

What is "magnet wire"? I have a test procedure I am trying to follow and it calls for "two strands of twisted magnet wire." I know it is referring to something like this: http://www3.towerhobbies.com/cgi-bin/wti0001p?&I=LXHZW4&P=FR I know the transmission line characteristics of twisted...

If a wire moves with some constant velocity (4 m/s for example in the diagram) parallel to the direction of the wire itself (unlike in most physics problems in which you drag a wire 'sideways' or perpendicular to the direction of the wire) but still perpendicular to the magnetic field, what is...

Hi Why is there a voltage drop in a wire when there is a high current flowing ?. Is this due to the electrons colliding with the lattice which causes the kinetic energy that the electrons have gained trough the voltage to be transfer to heat energy ?

Hello All, I was curious to know if there is a way to calculate resistivity of a wire that did not have a uniform cross section? For example, what if the cable was in a bow-tie geometry? Is there anyway to quantify the electrical resistivity of the constriction (the area of the cable that has...

Homework Statement D=1.0cm=0.01m I=1.0A Homework Equations B=(μ0I)/(2∏r) The Attempt at a Solution B1=(4∏x10^-7 * 1.0A)/(2∏ * 0.01m)= 2.0x10^-5 B2=(4∏x10^-7 * 1.0A)/(2∏ * 0.01m)= 2.0x10^-5 Not sure what to do with these two numbers.

Homework Statement A charge q+ 4.5 x 10^-9 is located a distance of 7.0 mm to the right of a wire and is moving directly away from the wire with a velocity of v =3.0 x 10^4 m/s, as shown in the drawing (drawing shows charge moving to the right and current moving upwards). The wire carries a...

If I have a charged wire and shape it into a spiral, is the electric field stronger?

Hi, I'm doing a physics extended essay and my independent variable is the temperature of a copper wire. I need to be able to alter this temperature without connecting it to a circuit and was wondering if anyone had any suggestions on whether there is a special type of equipment (such as a probe)...

Homework Statement We have a toroidal coil, and an infinite wire that runs through it on its symmetry axis. (See picture) We need to find the mutual inductance between the coil and the wire in two ways: 1. By running a current through the wire, and finding the induced voltage in the...

A conducting wire slides with constant speed of 1 m/s on a bent L shaped metalic rail. The angke between the wire and the rail is 45 deg and it remains constant during the whole motion of the wire. Perpendicular to the plane of the rail acts a magnetic field B=0.2 T in the X direction (Into the...

For the basic principle of motors and electromagnetic induction, when a wire loop with a current running through it is put in a magnetic field, wouldn't it only spin until it reached a certain point (i.e. flat, 180 degrees) before it stopped? What accounts for this? Is it that the loop must...

how much current can a 3 mm wire carry? Hello I was wondering how much current can a wire with of 3 mm diameter can carry? Considering the maximum temperature of the wire doesn't change considerably, to melt the insulation... Unfortunately I don't know which gauge wire this is...

I have a bit of a theoretical question. If one has a current carrying wire in a magnetic field such as in an electric motor rotor, does the resulting force on the wire also impart an opposing force on the stator magnets which are producing the magnetic field as Newton’s third law says? Also, if...

If anyone wants a good laugh please read this article. If you take a shot every time you find an error, you will likely be drunk before you are finished reading. http://news.yahoo.com/heres-rare-closeup-planet-thats-300-million-light-220223737.html;_ylt=Ah6ZqTKb53fikMKpqfgW6PXQtDMD

Lets say in frame 1 I have a neutral current carrying wire that has a +x line charge and a -x line charge and they have a relative speed between them. So In frame 1 there is only a B field. And in frame 1 we also have an electron moving with respect to the wire, so the electron is deflected...

Homework Statement This is from A.P. French, Vibrations and Waves, Problem 3-7 A wire of unstretched length l0 is extended by a distance of 10-3l0 when a certain mass is hung from its bottom end. If this same wire is [turned to be horizontal] and the same mass is hung from the midpoint of...

Homework Statement Your data center has 100,000 CPUs. Each burns 100 W at 120 V. Copper has a resistivity of 1.7E-8 Ω*m. What is the maximum length of copper wire on the power supply to give a voltage drop of no more than 1V? Homework Equations P = V*I R = (rho*L)/A, where L is the...

In my examples on Faraday's law in my book, they use a drawing of a magnet approaching a circular wire. The changing magnetic flux then induces an emf on the circle of wire, which in turn causes a current to flow. I'm wondering if a current will flow in that wire without it having an element...

Seems to me in that an antenna is carrying microamps at most that slightly higher resistance of steel Vs copper wouldn't matter. What's the fault of this logic??

Let us consider a circuit... There's a 10 V battery... A Rh(resistor with changeable resistance) and another battery is connected in parallel in the circuit... Now current I (due to the 10 V battery) divides into two parts when it reaches the parallel connection... Let's note them by Ir and...

Homework Statement Per Maxwell's equation and my H. H. Skilling EM textbook, curl H = 0 in the absence of current density. But consider a long, thin wire along the z axis carrying time-invariant current I. By Ampere's law, at a point (x,0) outside the wire, H = I/2πx j . But curl H...

Homework Statement Find the total magnetic force acting on the loop http://tinypic.com/r/2yvvyuw/5 Homework Equations f_{m} = IL X B B =\frac{μ_{0}*I}{2∏*R} The Attempt at a Solution Magnetic Field from Wire at Top B = \frac{4∏*10^{-7}*10}{2∏*2*10^{-2}} B = .0001 Magnetic...

I was thinking whether it was possible to shield a portion of a circuit that has only a single conductor without a return path. The frequency is high enough for the Earth's capacitive impedance to be low. Is my assumption then correct that the induced voltage in the shield will create a...

Homework Statement Time Varying Current carrying wire creates time varying magnetic field.How can we analytically calculate electric field at distance r from the time varying current carrying wire? I(t) is time varying current where α , β are angle of two ends of current carrying wire...

I'm new to posting on this forum so excuse me if I'm using the wrong symbols underlined := vector/vectorfield δ := derivative uvar := unit vector Homework Statement Consider a finitely conducting wire of infinity length with radius b. The wire is centered about the z-axis. Current is...

Problem (a) Derive and expression (using cylindrical coordinates) for the drift velocity of a particle of mass m and charge q in a uniform vertical magnetic field B\hat{z} when the particle is located at a perpindicular distance p from a long, straight vertical wire carrying a line charge...

so say i have a nichrom wire of 0.5 mm dia, and pass 230 v through it.and i coil it up, but some part of the coil touched (imagine the wire parallel to each other so basically 2 circle.) will it short the circuit? i have been told that the area they touch is extremely smaller since they are...

Hi, this is my first posting on this forum in the hope someone could assist me with a calculation. I have read several threads which I think partly covers my problem but to be honest the example answers given are way beyond my comprehension. Basically I need to raise a platform which runs...

Homework Statement Find the mass of a wire in the shape of the parabola y=x2 for 1 \leq x\leq2 and with density p(x,y)=x. Homework Equations The Attempt at a Solution I just want to make sure I am setting this integral up right. Here is what I did: I parameterized the equation to x=t, y=t2...

let say i have a horizontal wire of alumel(or steel or what ever), the thermal conductivity is 30 w/m^2/k. let say D=0.4mm one end of the wire at 1000 degree c ( so like submerge in a cement which is at 1000 c). how long do i need wire to horizontaly in free air so that the cold end is at 100...

so i have a piece of nichrome resistance wire, 230 v supply in free air horizontal it is 650 c when current 3.61 ohm pass through. ( it in wikipedia) if i wrap the wire around inside a concerte or metal(assum it will not conduct electricity) small cylinder say 5cm dia. does the current have to...

I need to add flexibility to this joint (where the arrow is pointing) and I was thinking about using a method I saw on this flexible clamp. I ripped it apart and it looks like they used copper wire as the flex material. What would be the best wire to use? I'm worried that perhaps it could...

Homework Statement A Copper wire has a shape given by a radius that increases as R(x)= aex+ b. Its initial radius is .45 mm and final radius is 9.67 mm and its horizontal length is 38 cm. Find its resistance. Homework Equations R = pL/A where p = resistivity of copper A = ∏r2 L = length of...

1. A piece of wire 10 m long is cut into two pieces. One piece is bent into a square and the other is bent into an equilateral triangle. How should the wire be cut so that the total area enclosed is (a) a maximum? (b) A minimum? 2. A_{s}(x) = x^{2}, A_{t}(x)=\frac{\sqrt{3}}{4}x^{2}...

Homework Statement Determine a function for wire between two poles if the arc of the wire is parabola. For every 75m there is 1m of sag. Homework Equations y = a(x-p)^2 + q The Attempt at a Solution I think that you need to make the lowest point of the wire the origin and hence...

Hey. If a wire is conducting electricity and all the current is concentrated at the edge of the wire, as in the skin effect, the magnetic field everywhere inside should be zero due to symmetry when applying biot-savarts law. However, according to ampere's law, it shouldn't. I take a...

Homework Statement A potential difference of 50 mV is maintained between the ends of a 9.70 m length of wire whose cross section area is 25.0mm^2. The conductivity of the wire is 6.80 x 10^6 (ohm.m)^-1. Determine the rate at which the energy in the wire is transformed into kinetic to...

If I were to take a copper wire and shove it into the positive terminal of an electrical outlet and then stick the other side of the copper wire into the earth, will current flow??

http://upload.lsforum.net/users/public/m28175Untitledw43.jpg Q 21 why the is not downward?? it gains weight! Q22 why the direction is not out of paper, by right hand grip rule, 4 sides of the wire can produce a B-field which is out of paper!?

Homework Statement A long straight wire carries a current of 2.0A. An electron moves parallel to it at a distance of 0.01m (I'm assuming id doesn't matter which way it moves) at a velocity, v = 100ms-1 Calculate magnitude & direction of force acting on it.Homework Equations B = μ0 L / 2∏r F =...