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Physics
In a semiconducting material the mobilities of electrons and holes are μe and μh respectively. Which of the following its true?
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Q. In a semiconducting material the mobilities of electrons and holes are $\mu_{e}$ and $\mu_{h}$ respectively. Which of the following its true?
AIIMS
AIIMS 2005
Semiconductor Electronics: Materials Devices and Simple Circuits
A
$\mu_{e} > \mu_{h}$
38%
B
$\mu_{e} < \mu_{h}$
17%
C
$\mu_{e} = \mu_{h}$
38%
D
$\mu_{e} < 0; \mu_{h} > 0$
7%
Solution:
Hole is massive than electron, thus, mobility of holes is less than that of electrons, that is $\mu_{h} < \mu_{e}$
or $\mu_{e} > \mu_{h}$