GATE-PH SERIES Electronics
Semiconductor
2 previous year questions.
Volume: 2 Ques
Yield: Medium
High-Yield Trend
2
2021 Chapter Questions 2 MCQs
01
PYQ 2021
medium
electronics ID: gate-ph-
In a semiconductor, the ratio of the effective mass of hole to electron is 2:11 and the ratio of average relaxation time for hole to electron is 1:2. The ratio of the mobility of the hole to electron is
1
4:9
2
4:11
3
9:4
4
11:4
02
PYQ 2021
medium
electronics ID: gate-ph-
The donor concentration in a sample of n-type silicon is increased by a factor of 100. Assuming the sample to be non-degenerate, the shift in the Fermi level (in meV) at 300 K (rounded off to the nearest integer) is .
\text{(Given: } k_B T = 25 \, \text{meV at 300 K).}
\text{(Given: } k_B T = 25 \, \text{meV at 300 K).}