Resistors and Ohm's Law Video Lessons

Video Thumbnail

Concept

Problem: Pure silicon contains approximately 1.0 x 1016 free electrons per cubic meter.Resistivities at Room Temperature (20 °C)(a) Referring to the table above, calculate the mean free time for silicon at room temperature.(b) Your answer in part (a) is much greater than the mean free time for copper. Why, then, does pure silicon have such a high resistivity compared to copper?

FREE Expert Solution

(a) 

Mean free time, Tλ

Tλ=mne2ρ

93% (32 ratings)
View Complete Written Solution
Problem Details

Pure silicon contains approximately 1.0 x 1016 free electrons per cubic meter.

Resistivities at Room Temperature (20 °C)

(a) Referring to the table above, calculate the mean free time for silicon at room temperature.
(b) Your answer in part (a) is much greater than the mean free time for copper. Why, then, does pure silicon have such a high resistivity compared to copper?

Frequently Asked Questions

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Resistors and Ohm's Law concept. You can view video lessons to learn Resistors and Ohm's Law. Or if you need more Resistors and Ohm's Law practice, you can also practice Resistors and Ohm's Law practice problems.