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related to: r&l carriers

1. Copper Wire Question 2?

E = V / L = I R / L = I ( ρ L /A ) / L = I ρ / A = I ρ /(π r ^2) = 0.741 A * 1.72 10^-8 Ohm m/(3.1415*0.00344^2 m^2) = 3.43 10^-4 N/C

1 Answers · Science & Mathematics · 01/04/2014

2. A copper wire has radius r = 0.0205 cm, is 2.95 m long, has resistivity ρ = 1.72 · 10−8 Ω m, and carries a c?

...conductivity sigma = 1/resistivity = A/( L *resistivity), L = length But R = (resistivity)* L /A So sigma = L /AR j = i/A i = current So...

2 Answers · Science & Mathematics · 27/09/2012

3. resistivity of salt water solution?

R = ρ* L /A = 8.0645/0.25*0.1130/(π*(0.0130^2)) = 6870Ω

1 Answers · Science & Mathematics · 07/03/2010

4. Why is ohm's law voltage = current times resistance?

... (from definition of current density, n is the charge carrier q density) V = (b * I * L )/ nq^2 A Compare w/ definition of resistance: R = (rho)*( L /A) where rho is the resistivity...

2 Answers · Science & Mathematics · 21/05/2012

5. Magnetic field applied to a semiconductor?

..., the semiconductor has a resistance, R given by: R = V( L )/I( L ) = (.078)/(0.0015) = 52 Ohms Now the mobility of the current carrier is given by the drift velocity: v(d) = μE(W) where...

1 Answers · Science & Mathematics · 18/04/2007

.... Beyond r = R , B*2pi* r = u0i or B = u0i/(2pi* r ). Q3 - ? Q4 - don't remember dipole moment Q5 - because force = il x B where l and B are vectors, and the cross-product of two aligned...

1 Answers · Science & Mathematics · 01/08/2011

7. How much mass does gravity have?

...want to express the final answer in terms of the total mass m and the total radius R , we should try to avoid working with the density and the explicit expression for the...

14 Answers · Science & Mathematics · 18/06/2008

8. Conductivity and Drift Velocity?

A. R = V/I Resistivity = R *area/ L Conductivity = 1/resistivity B. Nelectrons/s = I...

1 Answers · Science & Mathematics · 06/05/2009

9. With regard to the flow of electric current, what is resistance?

... to the flow of current carrier and hence to the flow of currend,as current...of area of crossection A and length l ,having the drift velocity v,.../ml,Resistance( R )=ml/Ane^2t,

5 Answers · Science & Mathematics · 03/01/2014

10. W Boson questions.?

...spin-1 bosons which act as force carriers between quarks and/or ... ranges as: - R (W) ≈ R (Z) ≈ 2...as follows: - W+ -> l + + vl W- -> l - + vl'...

1 Answers · Science & Mathematics · 13/06/2008