Question
Download Solution PDFOn applying an electric field of intensity 10 V/cm across a semiconductor at a certain temperature the average drift velocity of free electrons is measured to be 70 m/s. Then the electron mobility is
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFConcept:
Mobility: It denotes how fast is the charge carrier is moving from one place to another.
It is demoted by μ.
Mobility is also defined as:
Where,
Vd = Drift velocity
E = field intensity
Calculation:
E = 10 V/cm
Vd = 70 m/s = 7000 cm/s
From equation (1):
μ = 700 cm2/Vs
Note:
Electron mobility is always greater than hole mobility,
Hence electron can travel faster and contributes more current than a hole.
Last updated on Jul 2, 2025
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