Question:
The energy required by the electron to cross the forbidden band for Germanium is:
The energy required by the electron to cross the forbidden band for Germanium is:
Show Hint
The band gap determines whether a material behaves as a conductor, semiconductor, or insulator.
Updated On: Mar 10, 2025
- 0.72 eV
- 1.1 eV
- 0.5 eV
- 1.5 eV
- 0.65 eV
Hide Solution
Verified By Collegedunia
The Correct Option is A
Solution and Explanation
The band gap energy of Germanium is 0.72 eV. This means that an electron requires 0.72 eV of energy to transition from the valence band to the conduction band, allowing electrical conduction.
Was this answer helpful?
0
0
Top Questions on Accuracy, precision of instruments and errors in measurement
- If a ray of light passes through a medium, its frequency and wavelength are \( 4 \times 10^{14} \) Hz and 450 nm respectively. Then the refractive index of the medium is:
- KEAM - 2024
- Physics
- Accuracy, precision of instruments and errors in measurement
- For the flow of incompressible liquid through a pipe, the Venturi-meter is used to measure the:
- KEAM - 2024
- Physics
- Accuracy, precision of instruments and errors in measurement
- If a body is taken above the surface of the Earth, it loses its weight by 20% at a height of \( h = \frac{\sqrt{5}}{2} R \), where \( R \) is the radius of the Earth, then:
- KEAM - 2024
- Physics
- Accuracy, precision of instruments and errors in measurement
- If a body at rest undergoes one dimensional motion with constant acceleration, then the power delivered to it at a time \( t \) is proportional to:
- KEAM - 2024
- Physics
- Accuracy, precision of instruments and errors in measurement
- If a freely falling body covers 80 m in the first 4 seconds, then in the next 4 seconds it covers a distance of:
- KEAM - 2024
- Physics
- Accuracy, precision of instruments and errors in measurement
View More Questions
Questions Asked in KEAM exam
- In the measurement of length 6 $\mu$m is equal to $x$ pm. Then the value of $x$ is
- KEAM - 2024
- Dimensional Analysis
- If the lines \( \frac{x-1}{2} = \frac{y-2}{\alpha} = \frac{z-3}{2} \) and \( \frac{x-1}{2} = \frac{y-2}{1} = \frac{z-3}{-2} \) are perpendicular, then the value of \( \alpha \) is:
- KEAM - 2024
- Integration
- An organic compound contains 37.5% C, 12.5% H and the rest oxygen. What is the empirical formula of the compound?
- KEAM - 2024
- Oxygen
- Let A, B, C denote the set of students in a college who play football, basketball, and cricket respectively. If \( n(A) = 60 \), \( n(B) = 55 \), \( n(C) = 70 \), \( n(A \cup B \cup C) = 100 \) and \( n(A \cap B \cap C) = 20 \), then the number of students who play exactly two of these sports is
- KEAM - 2024
- Relations and functions
For the reaction:
\[ 2A + B \rightarrow 2C + D \]
The following kinetic data were obtained for three different experiments performed at the same temperature:
\[ \begin{array}{|c|c|c|c|} \hline \text{Experiment} & [A]_0 \, (\text{M}) & [B]_0 \, (\text{M}) & \text{Initial rate} \, (\text{M/s}) \\ \hline I & 0.10 & 0.10 & 0.10 \\ II & 0.20 & 0.10 & 0.40 \\ III & 0.20 & 0.20 & 0.40 \\ \hline \end{array} \]
The total order and order in [B] for the reaction are respectively:
- KEAM - 2024
- Grignard’s reagents and their uses
View More Questions