COMEDK · Physics · 30. Semiconductors
Though \(\mathrm{Sn}\) and \(\mathrm{Si}\) are \(4^{\text {th }}\) group elements, \(\mathrm{Sn}\) is a metal while \(\mathrm{Si}\) is a semiconductor because
- A \(\mathrm{Sn}\) has more holes than \(\mathrm{Si}\)
- B The energy gap of \(\mathrm{Sn}\) is zero volt while that of \(\mathrm{Si}\) is \(0.07 \mathrm{~V}\)
- C The energy gap of \(\mathrm{Sn}\) is \(1.1 \mathrm{~eV}\) volt while that of \(\mathrm{Si}\) is \(0.07 \mathrm{~V}\)
- D \(\mathrm{Sn}\) has more electrons than \(\mathrm{Si}\)
Answer & Solution
Correct Answer
(B) The energy gap of \(\mathrm{Sn}\) is zero volt while that of \(\mathrm{Si}\) is \(0.07 \mathrm{~V}\)
Step-by-step Solution
Detailed explanation
The electrical nature of a material depends on the energy gap between the valence band and the conduction band. In Sn (white tin), the valence and conduction bands overlap, giving an effective energy gap of zero. Electrons can move freely, making it a metal. In Si, there is a…
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A hollow prism is filled with water and placed in air. It will deviate the incident raysCOMEDK 2024 Medium
- From the top of a tower, two stones whose masses are in the ratio \(1: 2\) are thrown-one straight up with an initial speed \(u\) and the second straight down with the same speed \(u\). Then, neglecting air resistanceCOMEDK 2017 Medium
- To get 300 MW electric power for half an hour, how much mass is to be completely converted into energy?COMEDK 2025 Medium
- For a projectile, the square of its horizontal range is equal to 8 times the square of the maximum height it reached. What is the angle of projection of the projectile?COMEDK 2025 Medium
- An electric field and magnetic field \(1.8 \times 10^4\ Vm^{-1}\) and \(6 \times 10^{-3}\ T\) respectively are applied simultaneously on an electron beam such that path of the beam remains undeviated, then the speed of the electron will be:COMEDK 2026 Easy
- What should be the value of self-inductance of an inductor that should be connected to \(220 \mathrm{~V}\) \(50 \mathrm{~Hz}\) supply, so that a maximum current of \(0.9\) A flows through it?COMEDK 2021 Medium
More PYQs from COMEDK
- The space between the two plates of a parallel plate capacitor is fully filled with a conducting slab. Then the capacitance of the capacitor is :COMEDK 2025 Easy
- A shopkeeper sells three varieties of fruit juice. He has a large number of bottles of same size of each variety. The number of different ways of displaying all the three varieties on the shelf with 5 places in a row and each display must have at least one bottle of each variety isCOMEDK 2025 Medium
- The wavelength of a monochromatic light which is used in single slit diffraction is 800 nm . The width of the single slit for which the first minimum appears at \(\theta=45^{\circ}\) on the screen will be:COMEDK 2025 Easy
- The resistance of a wire at room temperature \(20^\circ\text{C}\) is found to be \(10\Omega\). If resistance of the wire increases by \(10\%\), then the temperature of the wire will be (The temperature coefficient of the material of the wire at \(0^\circ\text{C}\) is \(0.002/^\circ\text{C}\))COMEDK 2024 Medium
- If \(|\mathbf{a} \times \mathbf{b}|=5\) and \(|\mathbf{a} \cdot \mathbf{b}|=3\), then \(|\mathbf{a}|^{2}|\mathbf{b}|^{2}\) is equal toCOMEDK 2012 Easy
- In which mode of transmission, the heat waves travel along straight line with the speed of light?COMEDK 2022 Easy