Wires Definition and 524 Threads

Homework Statement A very long, straight wire carries a current of 0.75 A. This wire is tangent to a single-turn, circular wire loop that also carries a current. The directions of the currents are such that the net magnetic field at the center of the loop is zero. Both wires are insulated...

Two long, straight wires are separated by 0.12 m. The wires carry currents of 3.5 A in opposite directions, as the drawing indicates. (a) Find the magnitude of the net magnetic field at the point A. (b) Find the magnitude of the net magnetic field at the point B...

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...

Magnetic Forces on Current-Carrying Wires (Conceptual Question)...Is answer correct? Two straight wires are parallel to each other and carry different currents in the same direction. Do they attract or repel each other? How do the magnitudes of these forces on each wire compare...

i m an electrical student. can anybody clearly tell me why is a return wire provided from the generating plant to the load? does current flow through the return wire or is it simply meant to form a closed lop?

I need help with one of my Physics homework problems please! A certain copper wire has a resistance of 10.0 Ohm. At what point along its length must the wire be cut so that the resistance of one piece is 4.0 times the resistance of the other? What is the resistance of each piece? I worked...

Homework Statement Along horizontal wire carries a current at 48 A. A second wire,made of 2.5 mm diameter copper wire and parallel to the first,is kept in suspension magnetically 15 cm below.Determine the magnitude and direction of the current in the lower wire.Is the lower wire in stable...

Homework Statement What is the force magnitude on the first, second, and third wires in the figure? Homework Equations (μ0L I1 I2)/(2πd) μ0 = 1.2566*10-6 The Attempt at a Solution Substituting 0.5 as L, 0.02 as d and 10 as I1 and I2 I get 5*10-4, which comes up as...

Homework Statement Two parallel infinitely long wires separated by a distance D carry steady currents I1 and I2 (I1>I2) flowing in the same direction. A positive point charge is moves between the wires parallel to the currents with a speed v at the distance D/2 from either wire. What is...

I was recently doing a project on a ultrasonic transreceiver, and was adviced to use thin multistrand wires for rigging the circuit., for reducing signal noise. I am not able to understand why we need to use multistrand wires, or if they help in reducing noise, how they help. Because i find...

Homework Statement Homework Equations B =( \mu * i * \phi ) / (2 * \pi * R) The Attempt at a Solution i wanted to add one more equation, but I am having difficulty in writing them. whatever! As you can see from the question there are 6 segments of current carrying wires...

[SOLVED] EM-Force between current wires Homework Statement Problem 105 in chapter 27 Tipler and Mosca for those playing at home... A long straight wire carries a current of 20 A, as shown in the figure. A rectangular coil with 2 sides parallel to the straight wire has sides 5 cm and 10...

Hi, can someone help me out? I've tried 5 different solution that I thought were definitely right and they all give me the same response: "Your answer is off by a multiplicative factor." Homework Statement Find the magnitude of the net magnetic field B_L created at point L by both wires...

Ok here the problem i need to find the tension of the three wires but I am very lost and don't know where to start or how to finish. so for i got 32*98 = 313.6N i don't know what to do next can someone please lead me in the correct direction to solve the problem.

Homework Statement Two long parallel wires are a center-to-center distance of 1.50 cm apart and carry equal anti-parallel currents of 1.80 A. Find the magnetic field intensity at the point P which is equidistant from the wires. (R = 4.00 cm). Homework Equations B= \frac{u_{0}I}{2\pi r}...

say you have a current carrying wire pointing in the +x direction, while there's an external magnetic field pointing in +y. Then the electrons in the wire feel a force towards +z. Well, what stops them from flying off the wire? If you make the current or the magnetic field strength strong...

A generating station is producing 1.4e6 W of power that is to be sent to a small town located 7.0 km away. Each of the two wires that comprise the transmission line has a resistance per kilometer of length of 5.0e-2 \Omega/km. (a) Find the power lost in heating the wires if the power is...

Why do they say that copper wires are more conductor than aluminium wires?

Could anyone gives me some hints of how to solve these problems ? 1. a sample of Ge has both electrons and holes carrying the current. When a hall measurement is done, there's no hall effect. If the mobility of electrons in Germanium is 3500 cm^2/V.s and that of holes is 1500 cm^2/V.s, show...

I'm not entirely sure how to word this without a diagram, but please bare with me! In an ideal case, the charge on a wire is evenly distributed. According to Gauss' Law, an electric field from a charged wire decays with 1/r where r is the distance from the centre of the wire. Say two...

hi, guys: I am reading some notes of Electromagnetism. It claims that for a helix solenoid with N turns of wire, the distance between the successive coil is \Delta a, the total vertical length of the solenoid is d. The artical claims that if we apply a voltage v to this solenoid...

Homework Statement A packed bundle of 100 long, straight, insulated wires forms a cylinder of radius R=.5cm a. if each wire carries 2A, what are the magnitude and direction of the magnetic force per unit length acting on a wire located .2cm from the center of the bundle? Homework...

Hi. Any help on this problem would be greatly appreciated. Here is the problem: A)Determine the magnetic field between two long straight wires at a point 0.500cm from the left wire when the two wires are 3.00cm apart in terms of the current I1 (left wire) when the other (right wire) carries...

Homework Statement There seem to be three right hand rules for dealing with magnetic field, current, and force, and I don't quite understand how to use them. Namely, I'm having trouble understanding why two parallel wires with current flowing in each of them attract if the currents are in...

Is is known exactly how electrons flow through wires? For example a wire is conductive, the air around it is not, and thin wires conduct worse then thick wires, would this mean that the electrons force, or flow is greatest in the centre of the wire? Like water through a pipe?

here's a statement "pipelining wires is an effective mechanism to overcome intrinsic wire latency" as related to the microprocessor architecture. What exactly is this "pipelining of wires"? I know what a pipeline architecture is of a processor vs let's say multicycle, but pipelining WIRES...

I was going to post this in the homework section, but there wasn't any forum for graduate-level problems. If someone wants to move this thread to a more appropriate forum (assuming there is one), however, please feel free to do so. Anyway, this is a problem for my PhD qualifying exam that...

Homework Statement Find the tension in the two wires supporting the 36 kg traffic light shown in Fig. 12-57. (Assume that 1 = 52° and 2 = 38°.) http://img15.imgspot.com/u/07/77/15/952alt.gif Homework Equations -T1cos(52)+T2cos(38)=m*g T1sin(52)+T2sin(38)=0 The Attempt at a...

Homework Statement Two parallel conductors carry currents in opposite directions, as shown in Figure P19.56. One conductor carries a current of 10.0 A. Point A is the midpoint between the wires, and point C is 5.00 cm to the right of the 10.0 A current. I is adjusted so that the magnetic...

Homework Statement An advertising sign of mass 40kg is suspended by two wires as shown in the diagram. What is the tension in each wire? http://img132.imageshack.us/img132/9681/untitledwx0.png I have no idea how to solve this, or what formulas a re relavent to it. Any suggestions are...

Homework Statement How far from a wire with a current of 5.0A is a second parallel wire with current 10A if force between them is 3.6x10^{-4} N? Homework Equations i think \frac{F}{L}=\left(\frac{u_o}{2\pi}\right)\left(\frac{I_{1}I_{2}}{s}\right) The Attempt at a Solution i think this just...

Homework Statement The figure (http://img.photobucket.com/albums/v80/northerndancer/thefigure.jpg?t=1173558797 ) is a cross section through three long wires with linear mass density 50 g/m. They each carry equal currents in the directions shown. The lower two wires are 4.0 cm apart and are...

Homework Statement Two long parallel wires, each with a mass per unit length of 43 g/m, are supported in a horizontal plane by 6.0 cm long strings, as shown in Figure P19.64. Each wire carries the same current I, causing the wires to repel each other so that the angle between the supporting...

Homework Statement Two very long straight wires carry currents perpendicular to the page. Wire 1, which carries a current I1 into the page, passes through the x-axis at x=+a. Wire 2, located at x=-2a, carries an unknown current. The net field at the origin (x=0), due to the current-carrying...

Digital Cable seems to be a newer thing, which would imply cable TV up to this point has been analog. How? How can a cable accurately carry an analog signal, probably based on voltage, if cable length greatly affects voltage? Wouldn't that cause all sorts of crazy problems such as things...

Hi I have a question about pulses in a wire. If I have a single wire of length X and I send a pulse through the wire, when the pulse gets to the end of the wire, does it reflect back with the opposite phase or in phase when the original pulse? I'm trying to visually compare the behavior with...

I know this might be Physic stuff but, we are doing Nano Technology in Chemistry so that is why I am posting it here. What I would like is some notes and article on this subject and it should be something eaisly understandable, not something hardcore stuff with a lot of formulas. If you have...

Hello All, I'm currently trudging through my physics class which is teaching about electric and magnetic fields, and their interactions. As I have been reading through the textbook, I have been trying to formulate ideas and understand exactly what is happening inside of current carrying...

I have to show that the capacitance per unit length for two identical wires of radius d separated (at the center) a distance D as: C/l = (pi epsilon0) / ( ln [( D - d ) / d] And I'm clueless. How do I go about solving this? I started by trying with C = q / V to C = lambda * l / V .. but I...

"Find the force per unit length on each of two long, straight, parallel wires that are 24 cm apart when one carries a current of 2.0 A and the other a current of 4.0 A in the same direction." Tell me if I'm doing this right: I use d = 0.24m, and the equations B = (mag. perm. * I)/(2*pi*d)...

Magnetism and Current Carrying wires (?) I have a homework problem my teacher gave and warned us it was "Very difficult". I've tried drawing out the forces and i think i have made some headway but the vector-nature of magnetism confuses me... For example, i see in some solutions the forces...

Another Electromagnetics question... Two long wires carry equal, but oppositely directed, 25 A currents. What is the magnitude of magnetic field due to these currents at point P? The wires are 0.1 m apart and point P is 0.05m in between the wires. Would the following be the correct way to...

how do i find the b field of two perpendicular wires. suppose one wire is pointing out of the page and the other one is going from left to right. I am looking for the magnetic field between them. o (wire going out of paper) B=? xxxxxxxx (wire going left to right)

Hello guys. I just had a question about the below problem. I am not sure if this is right but more likely it is wrong. I have been trying this problem for an extensive period of time now. If anyone could help out I would greatly appreciate it. Following the dashed lines I showed the work...

Right I'm doing a piece of work that needs a simple question answering. If you had two parallel electromagnets, between them a metal sheet that is being constantly vibrated with the electromagnets being used to dampen these vibrations, can you treat them as two current-carrying wires and use...

:confused: Anyone can explain to me what Absoloute Error is and what this means: Worst case % error = Absolote error/ Smallest reading * 100 For Voltmetre ______ % For Ammetere ______ % For Length _______ % For Diametre _______% _________________ Overall % error...

I'm a little confused about what happens when we connect two objects by a wire. Does this just equal the potentials, or does it equal the charges? Also, does this depend on the nature of the objects (is it different for e.g conductors or capacitors?) thanks for your help

Hi, I am new to the forums here, I have a radar detector that I want to hardwire and remotely view the lcd in my rear view mirror. I'm using cat5e cable to make the connections, the length is about 8'. I finally got the lcd in the rear view mirror and soldered all the connections. It...

As I understand it, a current flowing through a conducting strip in a magnetic field perpendicular to the current will drift to the side creating an electric field that corrects the currents motion and creates a potential difference across the conductor. Why then does a current carrying wire in...

I am currently working on a project in which photomultipliers are used. Specifically, they are Hamamatsu R6233HA models. In order to test these tubes, I have to connect the wires to a high voltage source. The problem is the wires are .110 inch in diameter and are not connected at the ends, so I...