If the drift velocity of holes under a field gradient of 200 V/m is 100 m/s, their mobility is SI units is

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ESE Electronics 2012 Paper 1: Official Paper
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  1. 0.5
  2. 0.05
  3. 50
  4. 500

Answer (Detailed Solution Below)

Option 1 : 0.5
Free
ST 1: UPSC ESE (IES) Civil - Building Materials
20 Qs. 40 Marks 24 Mins

Detailed Solution

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Concept:

The variation of drift velocity with the electric field for most of the semiconductor (except Ga AS) is as shown:

The initial slope of this curve gives the mobility of electrons:

 

Analysis:

vd = 100 m/s

E = 200 V/m

 

 m2 / V-s

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