Wires Definition and 524 Threads

Homework Statement A long straight wire 1 lies along the x-axis. A long straight wire 2 lies along the y-axis so as to pass very near, but not quite touch wire 1 at the origin. If both wires are free to move, what happens when currents are sent simultaneously in the +x direction through wire 1...

Hi all. I build a project that detects the level of the water reservoir and shows that digitally using the 7-segment display... It worked... This requires a wire with positive voltage (5V) to be at the bottom of the water reservoir (it's a copper - network wire) and a number of...

Homework Statement Three long parallel wires are 4.0 cm from one another. (Looking along them, they are at three corners of an equilateral triangle.) The current in each wire is 8.00 A, but its direction in wire M is opposite to that in wires N and P. By convention we can say that M is at the...

Homework Statement Three long parallel wires are 4.0 cm from one another. (Looking along them, they are at three corners of an equilateral triangle.) The current in each wire is 8.00 A, but its direction in wire M is opposite to that in wires N and P. By convention we can say that M is at the...

I have to connect very thin wires d<40\mathrm{\mu m} of different metals multiple times to make a thermopile. Due to the geometry, the cost of the wire and personal nerves I do not have too many tries. The wires are insulated, and in the end the whole thermopile should also be electrically...

Is neutral wire at 0 potential?? Does that mean we can easily touch it??

A steel wire of length 5.0m and radius 0.300 mm is knotted to another steel wire of length 5.0m and radius 0.10 mm. The ires are strethed with a tension of 150 N. How long does a transverse wave pulse take to travel the distance of 10 m from the beginning of the first wire to the end of the...

Homework Statement Two wires carry current I1 = 53 A and I2 = 37 A in the opposite directions parallel to the x-axis at y1 = 3 cm and y2 = 13 cm. Where on the y-axis (in cm) is the magnetic field zero? I1= 53 A I2=37A Homework Equations B(r)=Iu/[2(pi)r] The Attempt at a Solution...

Homework Statement If two long parallel wires are separated by a distance of 1.00 m and there is a current of 5.00 A up in the wire on the left and a current of 10.0 A up in the wire on the right, find the: a. magnetic field at a point 30.0 cm to the right of the left wire...

Two wires carry current I1 = 49 A and I2 = 31 A in the opposite directions parallel to the x-axis at y1 = 7 cm and y2 = 15 cm. Where on the y-axis (in cm) is the magnetic field zero? I don't even know where to start on this. Any help would be great!

Homework Statement Two supporting wires keep a flagpole in its vertical position. The horizontal components of the tensions in the supporting wires must be equal and opposite, otherwise the pole will move laterally. The vertical components may be different. The longer wire forms a 30...

Hey, I am fiddling around building, basically an alternator. Well, this is what i have designed so far. I made two copper coils, then squished so they were very eliptical and then connected the two flat coils together with zip ties and made a large coil. Basically, the large coil is the two...

Homework Statement Point P is midway between two long parallel straight wires that run north-south in a horizontal plane. The distance between the wires is 1 cm. Each wire carries a current of 1 A toward the north. a) find the magnitidue and direction of the magnetic field at point P...

1. Two infinitely long wires running parallel to the x-axis carry uniform charge densities +\lambda and -\lambda . Find the potential at any point. Show that the equipotential surfaces are circular cylinders, and locate the axis and radius of the cylinder corresponding to a given potential...

Homework Statement A 30.0m steel wire and a 20.0m copper wire, both with 1.00mm diameter, are connected end to end and stretched to a Tension of 150N. How long does it take a transverse e wave to travel the entire length of the two wires? Homework Equations Voulume of Rod = pie r^2(L)...

Homework Statement Three wires have linear density of 50 g/m. They each carry the same current. The bottom two are 4 cm apart and carry currents into the page. What current I will allow the third wire to float so as to form an equilateral triangle with the other two? Homework Equations...

Okay, this is a conceptual problem that I'm sure is easy, but is bugging me: I have two wires lying in the xy-plane. They're perpendicular, with one wire lying along the y-axis and on along the x-axis. The current in each wire points along the y and x axes, respectively. Now: What's the...

I'm wondering what causes the force is that holds wires together when their is a current flowing through them, and how to calculate it for different currents. As an example, when I am hooking my car battery up and you touch the jumper cable to the battery to connect the terminals, it kinda...

Homework Statement Two long, straight, parallel wires, 10.0 cm apart carry equal 4.00-A currents in the same direction, as shown in the figure. ( in the figure the current carrying wires are at the end of a straight 10cm line and they are each in the direction coming out of the page)...

Homework Statement Suppose that I1 = I2 = 20 A; currents are running opposite each other, and that the separation between the wires is 0.019 m. By applying an external magnetic field (created by a source other than the wires) it is possible to cancel the magnetic field at the position of each...

Homework Statement Two infinitely long parallel wires separated by a distance 2d, one carries uniform linear charge density of \lambda and the other one carries an uniform linear charge density of -\lambda, find the electric field at a point distance z away from the middle point of the two...

Homework Statement Two long, parallel wires carry currents of 20 A and 10 A in opposite directions, as in the figure below. Which of the following statements must be true? (Select all that apply.) In region II the field is into the page and can be zero. There are no points where the...

Homework Statement Two parallel wires are separated by 5.30 cm, each carrying 2.5 A of current in same direction. What is the magnitude of the force per unit length between the wires? Homework Equations B2=(mo constant)I2/2pid The Attempt at a Solution plugged 2.5 in for I and...

Homework Statement Two parallel wires are 6.8 cm apart, and each carries a current of 23.8 A. The permeability of free space is 4pi × 10−7 T · m/A. If the currents are in the same direction, find the force per unit length exerted by one of the wires on the other. Answer in units of...

Homework Statement A nonuniform horizontal bar of mass m is supported by two massless wires against gravity. The left wire makes an angle (phi) with the horizontal, and the right wire makes an angle . The bar has length L. What is the position of the center of mass of the bar, measured as...

Homework Statement The two wires carrying the currents are infinite in length. i1 = 5.00 A out of the paper and i2 = 7.00 A into the paper. a = 40.0 cm and b = 30.0 cm. Calculate the direction of the magnetic field at P, measured counterclockwise from the +x axis. Answer: 126.4°...

Homework Statement Two straight parallel wires are placed vertically on a wall. The distance between the wires is 12 cm and the current through each one is 7.5A. In the left wire the current is directed upwards and in the right one the current points downwards. Determine the magnetic field...

What type of metal are typically in wires? I believe that usually wires are made out of copper. Are most wires made out of copper? Does the size of the wire usually determine what metal is in a wire? For instance, are larger wires typically composed of copper, while smaller wires are...

AC motor from washing machine, has 11 wires from it. Aside from Earth I have no idea what they are however I have observed: If the white+blue OR the red+orange wires are bought into contact then the shaft becomes hard to turn AND I can get a few small sparks by spinning the shaft and quickly...

I felt like this problem was simple. We submit our answers in WebAssign however, and I can not find the correct solution. Two parallel wires are 20.0 cm apart, and each carries a current of 40.0 A. (a) If the currents are in the same direction, find the force per unit length exerted on...

Homework Statement Two long, straight wires are separated by a distance of 32.7 cm. One wire carries a current of 2.69 A, the other carries a current of 4.33 A. Find the force per meter exerted on the 2.69 A wire. Homework Equations The Attempt at a Solution

Homework Statement Two negative charges repel each other. Two parallel wires with current going in the same direction attract each other. Yet if one walks with the moving charge in the wires, the charges appear stationary and should repel each other - explain why if you are stationary...

Homework Statement Consider two parallel conducting wires along the direction of the z axis as shown below. Wire 1 crosses the x-axis at x = -1.80 cm and carries a current of 2.60 A out of the xy-plane of the page. Wire 2 (right) crosses the x-axis at x = 1.80 cm and carries a current of 8.80...

In the picture, two parallel wires carry currents in opposite direction. Where will the magnetic force never be zero? http://img154.imageshack.us/img154/4706/31130394mv0.th.jpg 1. you need to know the currents to answer this question 2. nowhere 3. part A 4 part B 5 part C All I...

Hi, Everyone, Just a quick question. In the diagram on this link, is V2 < V1 ? http://img246.imageshack.us/img246/4789/schemaep1.jpg Thanks.

Homework Statement three infinitely long straight wires are arranged in a plane as shown at the left. what is the magnetic field vector at point A(see attach.)? all wires carry current I Homework Equations F = IL X B where x indicates cross product, I is current, L is length, B is...

Homework Statement four parallel infinite wires are arranged as shown in the figure: (see attachment) a) calculate the value of the magnetic field produced along the central axis of the configuration (magnitude and direction) b) a fifth wires is placed along a central axis, parallel to...

Homework Statement Please see the attached figure. We have two parallel long wires carrying a time varying current I(t), but running in opposite directions. We wish to know the induced electric field between the wires, but only in the plane containing the two wires. Sorry that I don't know...

Homework Statement Calculate the magnitude of the magnetic field at a point midway between two long, parallel wires that are 1.0 m apart and have currents of 10.0 A and 20.0 A, respectively, if the currents are: a) In opposite directions, and b) In the same direction. Homework...

[SOLVED] Finding the force between 2 finite length wires Homework Statement The two wires of length 2m are 3mm apart and carry a current of 10 A dc. calculate the force between these wires.Homework Equations Well, I know that the force is found with F=IL\times B Since we aren't given B, the...

Two wires (radius a) with charge densities +λ and -λ are placed parellel to on another a distance d away. Find an expression for the potential difference between the wires and simplify with the assumption the d>>a. From that I need to find the potential difference at the midpoint between the...

[/B]Homework Statement The figure is a cross section through three long wires with linear mass density 43.0. They each carry equal currents in the directions shown. The lower two wires are 4.0 cm apart and are attached to a table. Homework Equations What current will allow the...

[SOLVED] ridid body equilibrium, tension in hanging wires Homework Statement A 60.0cm, uniform, 49.0N shelf is supported horizontally by two vertical wires attached to the sloping ceiling. A very small 25.0N tool is placed on the shelf midway between the points where the wires are attached...

Homework Statement The figure is a cross section through three long wires with linear mass density 52.0g/m. They each carry equal currents in the directions shown. The lower two wires are 4.0 cm apart and are attached to a table. (please see attachment) Just in case attachment is not working...

Why can't I use Ampere's law to compute the magnetic field at the center (P) of a semi-circular wire? If I calculate B at P due to d_theta, and then, using superposition, integrate from 0 to pi, the result is B=uI/2R. Biot-Savarte law gives the correct answer of B=uI/4R.

[SOLVED] Magnetic Field of Two Wires Homework Statement http://img80.imageshack.us/img80/5625/jonesj2qm4.gif If r = 30.0 mm, i = 2.00 A, and i' = 8.60 A, what is the magnitude of the magnetic field at the center point? Homework Equations B=(\mu_{0}I)/(2pi*r) The Attempt at a Solution I...

Homework Statement In this problem, you will be asked to calculate the magnetic field due to a set of two wires with antiparallel currents as shown in the diagram . Each of the wires carries a current of magnitude . The current in wire 1 is directed out of the page and that in wire 2 is...

Homework Statement A 75N bird feeder hangs from a vertical wire that is connected to two other upper wires that are attached to a horizontal support, as shown in the figure On a copy of the diagram, draw arrows to indicate the forces present in the wires By considering forces A...

Hi all, I have been set an experiment of relating to the current needed to melt a wire (predominantly dealing with R = ρL/A). This sounds like a really dumb question (because it is :redface:) but why does the wire melt when too much current is passed through? Also, what is the correlation...

[SOLVED] Frequency in two different wires Homework Statement An aluminum wire. of length L1=60.0cm, cross-section area 1.00 x 10^-2 cm^2, and density 2.60g/cm^3, is joined to a steel wire, of density 7.80g/cm^3 and the same cross-section area. The compound wire, loaded with a block of mass...