What is Not Directly Proportional to Current Density in the Drude Model?

AI Thread Summary
In the Drude model of electrical conduction, current density (J) is influenced by various factors, but it is not directly proportional to the average time interval between collisions, the number of charge carriers per unit volume, the square of the electron charge, the electric field present in the wire, or the resistivity of the wire. The key equation for current density is J = (n.e)Vd, where n is the volume charge density and Vd is the drift velocity. Understanding the relationships between these variables is crucial for solving related problems. The discussion highlights the need for additional equations to clarify the connections between drift velocity, charge, mass of electrons, and electric field strength. Overall, the complexities of the Drude model require a deeper exploration of the underlying physics.
timothyhenry
Messages
1
Reaction score
0

Homework Statement


In the drude model of electrical conduction, the current density (J) is not directly proportional to :
a. The average time interval between sucessive collisions
b. the number of charge carriers per unit volume
c. The square of the electron charge
d. The electric field presents in the wire
e. Resistivity of the wire


Homework Equations


J= (n.e).Vd
J = current density
n = volume charge density
Vd = drift velocity

n = ρ.Na/Mr
Na=avogadro's number
Mr = relative mass

The Attempt at a Solution


I can't figure out the connections to the problems... There are maybe more equations to this but i don't really know which one...
 
Physics news on Phys.org
You need the formula for the drift velocity in terms of the charge and mass of electron, the electric field d strength, and time between collisions.

ehild
 
Thread 'Collision of a bullet on a rod-string system: query'

Thread 'Collision of a bullet on a rod-string system: query'

In this question, I have a question. I am NOT trying to solve it, but it is just a conceptual question. Consider the point on the rod, which connects the string and the rod. My question: just before and after the collision, is ANGULAR momentum CONSERVED about this point? Lets call the point which connects the string and rod as P. Why am I asking this? : it is clear from the scenario that the point of concern, which connects the string and the rod, moves in a circular path due to the string...
View full post »
Thread 'A cylinder connected to a hanged mass'

Thread 'A cylinder connected to a hanged mass'

Let's declare that for the cylinder, mass = M = 10 kg Radius = R = 4 m For the wall and the floor, Friction coeff = ##\mu## = 0.5 For the hanging mass, mass = m = 11 kg First, we divide the force according to their respective plane (x and y thing, correct me if I'm wrong) and according to which, cylinder or the hanging mass, they're working on. Force on the hanging mass $$mg - T = ma$$ Force(Cylinder) on y $$N_f + f_w - Mg = 0$$ Force(Cylinder) on x $$T + f_f - N_w = Ma$$ There's also...
View full post »

Similar threads

Ranking Current Densities: How Do Different Factors Affect Current Flow?
Replies
6
Views
2K
Finding the conduction current density
Replies
3
Views
2K
Surface Current and Electric Field
Replies
1
Views
2K
Modeling the Driven Damped Oscillations in a Material
Replies
7
Views
2K
Resistance, current and current density
Replies
8
Views
2K
Find the magnitude of the current density
Replies
11
Views
4K
Finding expression for non-uniform current density of a wire
Replies
5
Views
2K
Current density, drift velocity and electric field
Replies
1
Views
10K
I Understanding dissipation of energy in a resistor through the Drude model
Replies
1
Views
2K
Magnetic field generated by a current in a wire - special relativity
Replies
1
Views
2K

Hot Threads

Recent Insights

Back
Top