Download App

Semiconductor Electronic: Material, Devices And Simple Circuits — Physics STD 12 Science — Question

Rajasthan BoardEnglish MediumSTD 12 SciencePhysicsSemiconductor Electronic: Material, Devices And Simple Circuits2 Marks
Question
A semiconductor has equal electron and hole concentration of $6 \times 10^8/m^3.$ On doping with certain impurity, electron concentration increases to $9 \times 10^{12}/m^3.$
  1. Identify the new semiconductor obtained after doping.
  2. alculate the new hole concentration.
✓

Answer

  1. The doped semiconductor is $n-$type.
  2. $\text{n}_\text{e}\text{n}_\text{h}=\text{n}^2_\text{i}$
  3. $\Rightarrow\text{n}_\text{h}=\frac{\text{n}^2_\text{i}}{\text{n}_\text{e}}$
    $=\frac{(6\times10^8)^2}{9\times10^{12}}=4\times 10^4\text{per m}^3$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "2 Marks Questions" from Semiconductor Electronic: Material, Devices And Simple Circuits→Semiconductor Electronic: Material, Devices And Simple Circuits — all question types→Physics STD 12 Science question papers→Rajasthan Board STD 12 Science question papers→Rajasthan Board question paper generator→

Similar questions

The wavelength of $\text{K}_\alpha$ X-ray of tungsten is 21.3pm. It takes 11.3keV to knock out an electron from the L shell of a tungsten atom. What should be the minimum accelerating voltage across an X-ray tube having tungsten target which allows production of $\text{K}_\alpha$ X-ray?
→
A uniform electric field of $10\ NC^{-1}$ exists in the vertically downward direction. Find the increase in the electric potential as one goes up through a height of $50\ cm.$
→
Explain some of the far reaching consequences of displacement current.
→
The electric force experienced by a charge of $1.0 \times 10^{-6}\ C$ is $1.5 \times 10^{-3}\ N.$ Find the magnitude of the electric field at the position of the charge.
→
A wire has a length of 2.0m and a resistance of $5.0\Omega.$ Find the electric field existing inside the wire if it carries a current of 10A.
→
What is the reason, why the diameter of the objective of a telescope should be large for a good resolution?
→
Verify that the units weber and volt-second are the same.
→
Write the difference between parallel combination and series combination of capacitors.
→
Write relation between conductivity and mobility of metal.
→
Derive an expression for the electric potential at any point along the axial line of an electric dipole?
→