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A gallium arsenide semiconductor at T = 300 K is doped with impurity concentration Nd = 1016 cm-3 The mobility μn is 7500 cm2/ V - s  . For an applied field of 10 V/cm the drift current density is
  • a)
    120 A/cm2
  • b)
    100 A/cm2
  • c)
    12 x 104A/cm2
  • d)
    12 x 10-4 A/cm2
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
A gallium arsenide semiconductor at T = 300 K is doped with impurity c...
J = eμn n0E = (1.6 x 10-19)(7500)(1016)(10) = 120 A/cm2
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Most Upvoted Answer
A gallium arsenide semiconductor at T = 300 K is doped with impurity c...
Of the gallium arsenide semiconductor can be calculated using the following equation:

μ = μn + μp

where:
μ is the total mobility
μn is the electron mobility
μp is the hole mobility

The electron mobility (μn) can be calculated using the equation:

μn = q * τn * μn0

where:
q is the elementary charge (1.6 x 10^-19 C)
τn is the electron lifetime
μn0 is the electron mobility at low doping concentration

The hole mobility (μp) can be calculated using the equation:

μp = q * τp * μp0

where:
τp is the hole lifetime
μp0 is the hole mobility at low doping concentration

To calculate the total mobility (μ), we need to know the values of μn0, μp0, τn, and τp. These values can vary depending on the specific properties of the gallium arsenide material and the impurity used for doping.

Without information about the specific values of μn0, μp0, τn, and τp, it is not possible to calculate the total mobility of the gallium arsenide semiconductor.
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A gallium arsenide semiconductor at T = 300 K is doped with impurity concentration Nd = 1016 cm-3 The mobility μnis 7500 cm2/ V - s . For an applied field of 10 V/cm the drift current density isa)120 A/cm2b)100 A/cm2c)12 x 104A/cm2d)12 x 10-4A/cm2Correct answer is option 'A'. Can you explain this answer?
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