I've been reading this website: www.physics.wayne.edu/~apetrov/PHY2140/Lecture8.pdf to learn how fast an electron moves in a circuit.
On page #8, #9 and #10 It says to take the Cross-sectional Area of the wire, The current, The density, The Charge and the electrons^3
Area- 3.14x10^-6 ( 2mm thick wire = 3.14 × (0.001 m)^2 = 3.14×10^−6 m^2 = 3.14 mm^2) Current- 10 I Density of copper- 8.95 g/cm^3 charge of 1 electron- 1.6x10^-19 electrons^3- 8.48x10^22 = ( 6.02*10^23 mole * 8.95 g/cm^3 * (63.5 g/mole)^-1 ) Total: 10 / 8.48x10^22 m^3 * 1.6x10^19 * 3.14x10^-6 m^2 = 2.48x10^-6 m/s
But they say that with 2.48x10^-6 m/s It'll take the electrons 68 minutes to travel 1 meter, How is that possible?
When I calculated that equation I end up with 5.9245283e+35, Then when I try to calculate again to get 68 minutes to travel 1 meter I can never get it right.
I'm not the best at math, The m's confused me. What am I missing ?