English
Karnataka Board PUCPUC Science 2nd PUC Class 12

In a p-type semiconductos, which of the following statement is true:

Advertisements
Advertisements

Question

In a p-type semiconductos, which of the following statement is true:

Options

  • Electrons are majority carriers and trivalent atoms are the dopants.

  • Electrons are minority carriers and pentavalent atoms are the dopants.

  • Holes are minority carriers and pentavalent atoms are the dopants.

  • Holes are majority carriers and trivalent atoms are the dopants.

MCQ
Advertisements

Solution

Holes are majority carriers and trivalent atoms are the dopants.

Explanation:

In a p-type semiconductor, the holes are the majority carriers, while the electrons are the minority carriers. A p-type semiconductor is obtained when trivalent atoms, such as aluminium, are doped in silicon atoms.

shaalaa.com
  Is there an error in this question or solution?
Chapter 14: Semiconductor Electronics: Materials, Devices and Simple Circuits - Exercise [Page 509]

APPEARS IN

NCERT Physics Part I and II [English] Class 12
Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits
Exercise | Q 2 | Page 509
NCERT Physics Part I and II [English] Class 12
Chapter 14 Semiconductor Electronics: Materials, Devices and Simple Circuits
Exercise | Q 14.2 | Page 497

RELATED QUESTIONS

Electronic configuration of germanium is 2, 8, 18 and 4. To make it extrinsic semiconductor small quantity of antimony is added. The correct statement is ____________.


In p-type semiconductor, the dopant is ______.


Explain the following term:

Extrinsic semiconductor


Distinguish between n-type and p-type semiconductors.


Sn, C, and Si, Ge are all group XIV elements. Yet, Sn is a conductor, C is an insulator while Si and Ge are semiconductors. Why?


Suppose a ‘n’-type wafer is created by doping Si crystal having 5 × 1028 atoms/m3 with 1 ppm concentration of As. On the surface 200 ppm Boron is added to create ‘P’ region in this wafer. Considering n i = 1.5 × 1016 m–3, (i) Calculate the densities of the charge carriers in the n and p regions. (ii) Comment which charge carriers would contribute largely for the reverse saturation current when diode is reverse biased.


The figure shows a piece of pure semiconductor S in series with a variable resistor R and a source of constant voltage V. Should the value of R be increased or decreased to keep the reading of the ammeter constant, when semiconductor S is heated? Justify your answer


Name the extrinsic semiconductors formed when pure germanium is doped with a trivalent impurity. Draw the energy band diagram of extrinsic semiconductors so formed.


Pieces of copper and of silicon are initially at room temperature. Both are heated to temperature T. The conductivity of ______.


The majority charge carriers in a P-type semiconductor are ______.


What is the conductivity of intrinsic semiconductors at room temperature?


What is a doped semiconductor called?


To which group of the periodic table do silicon and germanium belong?


What is the valency of silicon and germanium?


Which type of dopant is arsenic (As)?


Why are different impurities added to semiconductors?


What are the two types of extrinsic semiconductors?


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×