27. Resistors & DC Circuits
Microscopic View of Current
27. Resistors & DC Circuits Microscopic View of Current
1PRACTICE PROBLEM
A pure germanium crystal has a resistivity of 0.60 Ω•m and 2.5 × 1013 electrons/cm3 at 20 °C. a) Determine the mean free time for germanium at this temperature. b) Determine the mean free time for germanium when it is greater than the mean free time for some other type of conducting material. Provide a reason for why there is a high resistivity for germanium relative to a conductor.
A pure germanium crystal has a resistivity of 0.60 Ω•m and 2.5 × 1013 electrons/cm3 at 20 °C. a) Determine the mean free time for germanium at this temperature. b) Determine the mean free time for germanium when it is greater than the mean free time for some other type of conducting material. Provide a reason for why there is a high resistivity for germanium relative to a conductor.