Rankers Physics

Properties of Semiconductors: Practice Problem & Solution

In a n-type semiconductor, which of the following statement is true? (2013)
Holes are majority carriers and trivalent atoms are dopants
Electrons are majority carriers and trivalent atoms are dopants
Electron are minority carriers and pentavalent atoms are dopants
Holes are minority carriers and pentavalent atoms are dopants

Solution Explained:

To solve this problem, we apply the core principles of Properties of Semiconductors. Understanding the underlying formula is key to arriving at the correct answer below:

In an n-type semiconductor, pentavalent atoms are added as dopants, making electrons the majority charge carriers. Consequently, holes become the minority charge carriers.[cite: 1]

Leave a Reply

Your email address will not be published. Required fields are marked *

Similar Practice Questions

Explore conceptually related problems to test your knowledge.

1. Assertion (A): GaAs is preferred for making solar panels. Reason (R): \(\Delta E_g\) for GaAs is \(1.5\text{ eV}\), and sun's radiation has highest intensity around this energy level.  
2. A p-n photodiode is fabricated from a semiconductor with a band gap of 2.5 eV. It can detect a signal of wavelength (2009)
3. Assertion (A): In a N-type semiconductor, the number of holes get reduced. Reason (R): Rate of recombination of holes would increase due to the increase in the number of electrons  
4. Assertion (A): Width of depletion region is reduced in forward bias. Reason (R): In n-type semiconductor majority charge carriers are free electrons while in p-type they are holes.
5. A conducting wire of Copper and Germanium are cooled from room temperature to temperature 80K, then their resistance will :