Physics · Electric current: drift velocity, mobility and their relation with electric current
Mobility of free electrons in a conductor ¡s:
Mobility of free electrons in a conductor ¡s:
- A. directly proportional to electron density
- B. directly proportional to relaxation time
- C. inversely proportional to electron density
- D. inversely proportional to relaxation time
Step-by-step solution
Mobility (μ) is defined as μ = eτ/m, where e is electron charge, τ is relaxation time, and m is effective mass. Thus, mobility is directly proportional to relaxation time and independent of electron density.
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