Thursday

August 28, 2014

August 28, 2014

Posted by **samantha** on Wednesday, November 21, 2012 at 11:38pm.

Your help is much appreciated! :)

- Physics. Free electron density, please help! -
**Count Iblis**, Wednesday, November 21, 2012 at 11:52pmCompute the current I using Ohm's law.

The flux of free electrons F is the free electron density tomes the drift velocity v. If you multiply this flux by the electron charge and the cross section, you get the current. By equating this with what you get from Ohm's law, you can thus solve for the free electron density.

- Physics. Free electron density, please help! -
**drwls**, Wednesday, November 21, 2012 at 11:53pmCall the free electron density N, m^-3

e = electron charge , Coulombs

V = electron drift speed

I = current, Amps

A = cross sectional area, pi r^2, m^2

I = N*A*e*V

Solve for N in this case.

Get the current I from ohms law. I = V/R

**Related Questions**

physics - A length of wire has a radius of 3.00 ~ 10-3 m and a resistance of 0....

university, physics. - A length of wire has a radius of 3.00 ~ 10-3 m and a ...

physics, university - A length of wire has a radius of 3.00 x 10-3 m and a ...

Physics - Calculate the resistance per unit length of a nichrome wire, which ...

physics - As part of a class project you are given 0.900 g of nichrome and asked...

physics Important please - A potential difference of 12.0V is maintained across ...

Physics - A piece of copper wire has a resistance per unit length of 5.50 x 10...

Physics - Two wires with the same resistance have the same diameter but ...

physics Important please - A metal wire has a resistance of 8.00Ω at a ...

Physics - Two resistors 10 Ω and 5 Ω are connected in parallel across ...