JEE Mains · Physics · STD 12 - 14. Semicondutor electronics
For extrinsic semiconductors; when doping level is increased;
- A Fermi-level of \(p-\)type semiconductor will go upward and Fermi-level of \(n\) -type semiconductors will go downward.
- B Fermi-level of \(p-\)type semiconductors will go downward and Fermi-level of \(n\) -type semiconductor will go upward.
- C Fermi-level of both p-type and \(n\) -type semiconductros will go upward for \(T > T _{ F }\) \(K\) and downward for \(T < T _{ F } K ,\) where \(T _{ F }\) is Fermi temperature.
- D Fermi-level of \(p\) and \(n\) -type semiconductors will not be affected
Answer & Solution
Correct Answer
(B) Fermi-level of \(p-\)type semiconductors will go downward and Fermi-level of \(n\) -type semiconductor will go upward.
Step-by-step Solution
Detailed explanation
conceptual
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
- Figure shows a rod \({AB}\), which is bent in a \(120^{\circ}\) circular arc of radius \(R\). A charge \((-Q)\) is uniformly distributed over rod \({AB}\). What is the electric field \(\overrightarrow{{E}}\) at the centre of curvature \({O}\) ?
JEE Mains 2021 Hard - A capacitor of capacitance \(500\,\mu F\) is charged completely using a dc supply of \(100\,V\). It is now connected to an inductor of inductance \(50\,mH\) to form an \(LC\) circuit. The maximum current in \(LC\) circuit will be \(.........A\).JEE Mains 2022 Medium
- Time \((T)\), velocity \((C)\) and angular momentum \((h)\) are chosen as fundamental quantities instead of mass, length and time. In terms of these, the dimensions of mass would beJEE Mains 2017 Hard
- Two planets have masses \(M\) and \(16\, M\) and their radii are \(a\) and \(2\, a\) respectively. The separation between the centres of the planets is \(10\, a.\) A body of mass \(m\) is fired from the surface of the larger planet towards the smaller planet along the line joining their centres. For the body to be able to reach at the surface of smaller planet, the minimum firing speed needed isJEE Mains 2020 Hard
- If each diode has a forward bias resistance of \(25\,\Omega\) in the below circuit,Which of the following options is correct:
JEE Mains 2023 Medium - A large number \((n)\) of identical beads, each of mass \(m\) and radius \(r\) are strung on a thin smooth rigid horizontal rod of length \(L\, (L >> r)\) and are at rest at random positions. The rod is mounted between two rigid supports (see figure) . If one of the beads is now given a speed \(v\), the average force experienced by each support after a long time is (assume all collisions are elastic)
JEE Mains 2015 Hard
More PYQs from JEE Mains
- The transfer characteristic curve of a transistor, having input and output resistance \(100\,\Omega \) and \(100\,k\Omega \) respectively, is shown in the figure. The Voltage and Power gain, are respectively
JEE Mains 2019 Hard - Match List \(- I\) (Electromagnetic wave type) with List \(- II\) (Its association/application) and select the correct option from the choices given below the lists
\(a\) \(b\) \(c\) \(d\)લિસ્ટ\(-I\) લિસ્ટ\(-II\) \(a\). Infrared waves \(i\). To treat muscular strain \(b\). Radio waves \(ii\). For broadcasting \(c\). \(X-\)rays \(iii\). To detect fracture of bones \(d\). Ultraviolet rays \(iv\). Absorbed by the ozone layer of the atmosphere JEE Mains 2014 Medium - The probability that a randomly chosen \(2 \times 2\) matrix with all the entries from the set of first \(10\) primes, is singular, is equal toJEE Mains 2022 Hard
- A ring and a solid sphere roll down the same inclined plane without slipping. They start from rest. The radii of both bodies are identical and the ratio of their kinetic energies is \(\frac{7}{\mathrm{x}}\) where \(\mathrm{x}\) is___________.JEE Mains 2024 Hard
- Let \(\vec{a}=a_{1} \hat{i}+a_{2} \hat{j}+a_{3} \hat{k} \quad a_{i}>0, i=1,2,3\) be \(a\) vector which makes equal angles with the coordinates axes OX, OY and OZ. Also, let the projection of \(\vec{a}\) on the vector \(3 \hat{i}+4 \hat{j}\) be \(7\) . Let \(\vec{b}\) be a vector obtained by rotating \(\vec{a}\) with \(90^{\circ}\). If \(\vec{a}, \vec{b}\) and \(x\)-axis are coplanar, then projection of a vector \(\vec{b}\) on \(3 \hat{i}+4 \hat{j}\) is equal toJEE Mains 2022 Hard
- If \(\operatorname{I}(m, n)=\int_0^1 x^{m-1}(1-x)^{n-1} d x, m, n\gt0\), then \(I(9,14)+I(10,13)\) isJEE Mains 2025 Easy