Wire Definition and 1000 Threads

I'm trying to find a silver chain that can be used for a small bead with a small hole. Obviously, the chain needs to be thin enough to fit through the hole, but I can't measure the hole inside the bead by hand. I found a chain that is 0.9mm in diameter, but I'm not sure the bead will fit. So...

Homework Statement Which wire will experience the biggest force? a. 1 b. 2 c. 3 d. all wires experience the same force e. can't be determined without additional information Homework Equations F = BIL sin θ The Attempt at a Solution Can the above formula be applied to a...

Homework Statement Write code to calculate the input impedance on a thin wire antenna using the below form of Pocklington's integral equation. Use Method of moments. Use a pulse as the basis function, point matching and delta-gap generator as the 'source'. Assume the wire is broken up into 7...

I don't know how many of you have heard of the recent release by Wikileaks about Trapwire, but any discussion on that? There seems to be no way in the system to fight this because it was never approved by the people in the first place.

Here's the computer that i have http://www.geeks.com/details.asp?invtid=AM3100-U3201A-R&cm_mmc=geekmail-_-newarrivals_html-_-07jun08-_-AM3100-U3201A-R&AID=10445123&CJPID=4176654 and i recently took the mother board out of the acer and put it in a knew case. I have the motherboard specs for the...

Homework Statement Determine the direction of the force acting on the current-carrying wire in the magnetic field. Homework Equations Lenz's Law The Attempt at a Solution This problem confuses me as the current is moving in a circular loop. However, I tried to use Lenz's Law and...

I am new here and asking question for the first time of course. My question is very simple. Does electric field intensity exist 'inside' a wire carrying current? Please explain the answer.

Hi i work at mission central tearing down computers and other electronics plus i look for electronics at the curb that people threw out. I was wondering if i can make a wire strippers that will strip many size wire and also feed it through by itself or with a little help. I want to make it with...

Hello All, Greetings. I am new to this forum. I am working for a heater project, in which we use plastic (PA66) over molded on aluminum (6061-T6) body for melting corrosive liquids (similar to sea water). The Aluminum body is heated by means of Positive temperature coefficient material (PTC)...

Hello, I have cool idea for a device and one hardest part of it is to detect the movement of the object. I think I can use a wire coil, and a small magnet attached to the moving object. When the object passes the wire coil (up or down), there will be small voltage inside the wire coil. It...

what rule hand rule shall be use in determining the direction of magnetic field in a single circular loop..pls. help me

I'm just confused... I know that magnetic fields can do work only on pure magnetic dipoles like a bar magnet. Based on the formula, the magnetic force on a charge is qv⃗ ×B⃗ which is identically perpendicular to v⃗ and that's why it does no work. However, forces on magnetic dipoles and more...

I have a question in my mind whether two way communication is possible over same wire. For example, suppose you have a coaxial line which is used to send information from A end to B end. Now, Is it possible that B sends info to A simultaneously when A is sending info to B?

Homework Statement A conducting wire runs directly over a horizontal compass in the north-south direction. When a current of magnitude I passes through the wire, the compass needle swings 20° to the west and stays in that position. When a current of 2I passes through the wire, the compass...

It is zero, contrary to published formulas. I assume that we are talking about a single wire, not about a twisted bunch of wires. Why is the misconception so popular?

Can you unsolder a firewire ports pins on the green board and solder a usb port in its place?

Can i wire fire wire to usb wire? What i mean is cut one end off on a fire wire and one end off a usb wire and wire the two together would that work?

Homework Statement Consider a bead of mass m constrained to slide without friction along a rigid wire that rotates about the vertical at a fixed angle \theta with constant angular velocity \omega. Write down the Lagrangian in terms of z as the general coordinate. Find the equation of motion...

Hello experts. This is a unusual behaviour. I moved to new house, an apartment newly constructed less than a year old. I first noticed shock when I was disammbling my computer , i immediately took out multimeter and tester. First checked with tester, it did not show any symptoms of...

so basically i was considering the speed of the charges inside wire defined by the drift velocity and speed of electric waves that's equal to speed of light..so my point is if electric waves don't carry any charge (as mostly light that we encounter from sun's radiation is em and since they don't...

Lets have a charged particle at a distance x at the beginning with velocity v away from a current carrying wire with current I. So, what will be the maximum distance of the particle from the wire? (only consider magnetic field)(wire is of infinite length) There are two ways of solving the...

I am having problem understanding the working of Stretched wire potentiometer. Now the book says that the potential of a and A are same because the wire Aa has negligible resistance. That is were the problem comes for me. Suppose the batter connected to AB be of 10V (assume negative terminal...

Homework Statement A wire segment 1.2 m long carries a current I = 3.5 A, and is oriented as shown in the figure. The +x-axis points directly into the page. A uniform magnetic field of magnitude 0.50 T pointing toward the -x direction is present as shown. What is the magnetic force vector on...

Homework Statement A 10-g piece of copper is to be formed into a wire of radius 1.0 mm at a temperature of 50° C. What is the resistance of this wire? (Hint: you will need to look up the density of copper.) If a potential of 12 V is put across this wire, what is the drift velocity...

Homework Statement Two beads A and B move along a semicircular wire frame as shown in the figure as shown in figure. The beads are connected by an inelastic string which always remains tight. At an instant the speed of A is u, angle BAC is 45 degrees and angle BOC is 75 degrees, where O is the...

I'm not sure about the force 3 wires have, here's the question. The question is: "Calculate the force per unit length experienced by the middle wire in the arrangement shown." The thing is I've an overall force of 0 because I1 and I3 are in different directions each producing a...

I've checked Wikipedia for answers but can't find any. I'm learning electromagnetism in school now. I don't know why this happens and so I can't understand the lessons! Can anyone tell me why? Thx :)

I've done an experiment for Single Wire Transmission using Steve Jackson's plans. I went through a series of tests to show what works and what doesn't work. I have demonstrated that the technology does in fact work but some claims towards how it works may be false so I have left it up to you...

Homework Statement Does anybody know where to find a source that describes the electrical field between two opposing wire tips with a small gap between them? The problem is more or less finding a quotable source, not so much solving the problem. Homework Equations Not relevant now...

It is given in my book. hat F=B I l sin theta where theta is the angle between B and the current I... I guess this is no right.. I mean, how would the current make an angle with B, it should b the length of wire itself... Secondly F=Bqv is the reason behind a charged particle which enter...

If I have a conducting wire of length l and a charge separation develops between one end of the wire and the other, will the electric field have a magnitude is equal to: V/l (voltage/length of wire)??

Homework Statement A battery if emf E0=12v connected across a 4m long uniform wire having resistance 4Ω. The cells of small emf E1=2v and E2=4v having internal resistance 2Ω and 6Ω respectively, are connected as shown in figure below. If galvanometer shows no deflection at the point N, then...

Homework Statement The problem statement is attached. The Attempt at a Solution I know how to solve the problem. However, my teachers solutions notes and my book's do it differently, and I want to ask what the difference is, so I have attached them both. My book does it the way I did it. My...

]Homework Statement A closed loop of wire 7.2 x10^{}-3 m^{}2 is placed so that it is at an angle of 60degrees to a uniform magnetic field. The flux density is changing at 0.1 T/s. The emf, in V, induced in the loop of wire is A) 3.6x10^{}-4 b)3.6x10^{}-2 6.9 Homework Equations emf...

I can't find the current in the following picture, please help me to find it and show the step, thanks.

I'm creating a project where I am attempting to melt solder paste using the current running through two copper wires, in a kind of lap joint. I'm trying to figure out how much current would actually be going through the wires if I use a 9V battery. I'm not sure where to take into account heat...

suppose that i have a wire with a known thickness ... and i want to wind it around a solid cylinder with known dimensions, and in the end make a coil with the same length as the solid cylinder how do i relate between the length of wire required and the diameter of this coil?

a steel wire has an span of 800 meters,with weight of 1.44 kilograms per meter. how to determine then the actual tension force applied in both ends of the cable? assuming that both ends are in the same elevation. thanks..

I am trying to understand how exactly electric and magnetic fields work. So far this is my understanding. A particle which has charge has an electric field around it. If the charged particle moves, it forms a magnetic field with its force lines perpendicular to direction of the movement...

Imagine a wire with uniform circular cross-sectional area and length l. It is being pulled at both ends with a horizontal force that is equal and opposite to each other. The wire obeys Hooke's law up to breaking. (1) How do we calculate the work done by the wire if both sides of the wire...

Why when two charged conductors connected by a conducting wire gain the same potential . Lets say we have two spheres of different charges why when we connect them by a single copper wire they gain the same potential Thanks in advance

Homework Statement One step in one of the problems in my book (involving calculation of the Poynting vector) asks to find the electric field outside a wire. This wire is resistanceless and the current is steady. Homework Equations Maxwell's. The Attempt at a Solution Stared at...

Homework Statement This is more of a general question about magnetic flux in a uniform magnetic field, but I think this is the correct place to post it. I understand that magnetic flux through an area A is the product of the magnetic flux density B and the projection of area A onto a surface...

Homework Statement Not homework, but something I'm interested in finding out. The setup is a flexible wire with left endpoint fixed at x=0 and right endpoint at x=L. You push the right endpoint with some horizontal force directed towards the left endpoint which will move the right endpoint...

My headphones had a loose connection. I could make the sound cut in and out of the right ear by bending the cable just above the audio plug. So I set about peeling back the insulation. I thought it would be as simple as soldering the broken wire back together. I was wrong for a couple of...

Homework Statement A current I is flowing in a square wire loop of side a. Find the approximate value of the magnetic field intensity magnitude at the point P, which is near to one of the corners in the plane of the square at the same d distance from the near two sides! (d<<a). Homework...

Homework Statement A uniform magnetic field B is confined to a cylindrical volume of radius 0.080m. B is directed into the plane of the paper and is increasing at a constant rate of (delta)B/(delta)t=0.300 T/s. Calculate the magnitude and direction of the current induced in a circular wire...

A straight wire clamped vertically at its lower end stands vertically if it is short, but bends under its own weight if it is long. It can be shown that the greatest length for vertical equilibrium is l, where kl(3/2) is the first zero of J-1/3 and k=4/3r2*√(ρg/∏Y) where r is the radius, ρ is...

hey guys i have a question. i solved the problem but i don't understand how to do it. Two perpendicular straight wires join in the ends of a semicircular loop of radius a = 11 cm, as shown in the figure above. If the current I =6 A, what is the resultant field at the center of the circular...

Homework Statement Whilst revising the Biot-Savart law, I came across the result: for the magnetic field due to a long straight wire. I understand that this can be found by integrating the Biot-Savart equation over the length of the wire, however after attempting the integral myself and...