Physics · 2019
JEE Main · 9 January 2019, Shift 1 · Q29
Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for an n-type…
Mobility of electrons in a semiconductor is defined as the ratio of their drift velocity to the applied electric field. If, for an n-type semiconductor, the density of electrons is $\displaystyle 10^{19} \mathrm{~m}^{-3}$ and their mobility is $\displaystyle 1.6 \mathrm{~m}^2 /(\mathrm{V} . \mathrm{s})$ then the resistivity of the semiconductor (since it is an n-type semiconductor contribution of holes is ignored) is close to :
Official answer
(4)
$\displaystyle 0.4 \Omega \mathrm{~m}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.