How Long Does It Take for an Electron to Travel Through a Silicon Block?

AI Thread Summary
The discussion revolves around calculating the time it takes for an electron to travel through a silicon block given specific parameters, including potential difference, resistivity, and dimensions. The resistance of the silicon block is noted as 54.1Ω, with a charge carrier density of 1.23x10^23 m-3. The user seeks assistance in determining the values for charge carrier density (n) and the electron's drift velocity (e) to complete their calculations. The relevant equations provided include Δt = L/Vd and others related to current and resistance. The inquiry emphasizes the need for clarity on these values to solve the problem accurately.
loganblacke
Messages
48
Reaction score
0

Homework Statement


A potential diffference of V = .497 V is applied across a block of silicon with resistivity 8.75 x 10-4 Ωm. The dimensions of the block are width = a = 2.00 mm, and length L = 14.7 cm. The resistance of the block is 54.1Ω, and the density of charge carries is 1.23x1023 m-3. Assume that the current density in the block is uniform and that current flows in silicon according to Ohms Law. The total length of 0.507mm diameter copper wire in the circuit is 79.1 cm. Assume that the resistivity of copper is 1.72x10-8Ωm for this problem.

On average, how long does it take an electron to pass from one end of the block to the other?


Homework Equations


Δt = L/Vd = Lanbe/i


The Attempt at a Solution



L = .145 m
a = .002 m
n = ?
b = ρsL/aRs = .00121 m
e = ?
i = 9.55 mA

Can someone please help me with the values for n and e? Thanks
 
Physics news on Phys.org
Your n value would merely be the density of charge carriers per unit volume.
 
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 »

Similar threads

How Long Does It Take an Electron to Travel Through a Copper Wire?
Replies
1
Views
2K
E-Field Through Copper Wire given drift velocity
Replies
2
Views
8K
How long does it take an electron to travel 150 km on a copper cable?
Replies
4
Views
12K
Find Drift Speed of Electrons in Copper Wire | Tom
Replies
2
Views
2K
How Long Does an Electron Take to Travel the Length of a High-Voltage Cable?
Replies
1
Views
5K
How Does Electron Drift Speed Affect Current Flow in Copper Wires?
Replies
1
Views
2K
Current flowing through a copper wire
Replies
2
Views
5K
How Long Does It Take for an Oil Drop to Travel Between Charged Plates?
Replies
1
Views
2K
How Does Electron Diffusion Affect Current Flow in Cylindrical Metal Wires?
Replies
2
Views
2K

Hot Threads

Recent Insights

Back
Top