Drift Definition and 168 Threads

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...

Not sure if this should be in this forum, but let's try. The problem is about 2 samples. One pure Na and one InSb. I want to determine the hall voltage when we send a current of 100mA trough the samples and the magnetic field is B = 0.1T. The samples are dimensioned "squared" 5x1x5mm. We...

Homework Statement A 200-km-long high-voltage transmission line 2 cm in diameter carries a steady current of 1000 A. If the conductor is copper with a free charge density of 8.5 x 10^28 electrons per cubic meter, how many years does it take one electron to travel th full length of the cable...

In class today we talked about drift velocity and we measured it for a 14 gauge copper conductor wire. It came out to be 3.55 * 10^-3 cm/s. I was wondering if the speed is so slow, then how can light come on instanteneously when you flip the switch over long distances? Is it because there might...

Dear All, I would be interrested by reading some original paper on the classical evaluation of the advance of the perihelion. I found a few simplified models (see...

I think that in Special Relativity, the drift of the perihelion can be calculated by cumulating elementary Lorentz transformations along the (Newtonian, unperturbed) trajectory. I read that the result of this calculation is much smaller than the experimental value. It is also well known that...

For a fascinating and detailed Powerpoint Presentation of one research group's reconstruction of the changes in continental configuation around Antarctica over the last 200MA, go to http://www.ig.utexas.edu/research/projects/ant_cd/ant_cd.htm?PHPSESSID=def1b9 and click "Antarctica: Keystone of...

Question asks: A potential difference of 3.0V is applied to the ends of a copper wire which is 0.5m long. In copper at room temperature, the average time interval between collisions is \tau = 2.7*10^{-14}s. What is the drift velocity of the free electrons in the wire? Well, I know that...

In a circuit, if the voltage is doubled, what happens to the drift velocity?

If I move a strip of copper mechanically with my hand through a uniform magnetic field will their be a drift velocity? And if so will the drift velocity be in the same direction as the moving copper strip? What would the magnitude of the drift velocity be if this happens? Can you have a drift...

I was solving the following problem the following way: In a solid the atoms are regularly arranged in space. The potential seen by an electron is thus periodic and the energy levels are arranged in bands in which the energy of a state k is given by: ek= Eat + 2t cos(ka) The relevant...

I've got an understanding problem. It's about the behaviour of charged particles in plasma inside of a tokamak. It says that a particle in the non-homogeneous magnetic field (toroidal field), moving on the spiral trajectory all along the magnetic field lines, tends to drift downward (for...

Describe the process of simulating a brownian motion with drift of 4 units and diffusion of 2 units. write a program in any application to imulate such a brownian motion. Anyone knows where should i start first if i use excel to do it. I don't know what equation to use.

The electron drift speed in a gold wire is 3.0 * 10^-4. 1. What is the current density in the wire? 2. What is the current if the wire diameter is 0.50 mm? J = I / A and I = nqva What is the answer?

You are more likely to be killed by a pig than by a shark. – Biologist; The History Channel, Beach, Sun, 911 – 7/7/01 Your fingernails grow at about the same rate that continental drift occurs.

for a normal solid cylindrical resistor, made of say copper, at room temperature, describe the relationshop between the current in the conductor, the drift velocity of conduction electrons in the conductor, and the thermal velocity of conduction electrons in the conductor.

I don't even know where to begin on this one. SPEAR, a storage ring about 72.0 m in diamter at the Stanford Linear Accelorator, has a 20.0 A circulating beam of electrons that are moving at nearly the speed of light. How many electrons are in the beam? My thoughts, hmmmm. Nothing I can...

Test 3: Dual GPS one-way Lightspeed tests outside the LASOF area. The oscillating quantum vacuum frame will originate a difference in the (one way) light speed between two GPS satellites in space (up and down), measured parallel with the orbital propagation direction of the Earth around the...