MHT CET202523 Apr 2025Morning ShiftPhysicsSemiconductorsActual
Which of the following statements is TRUE for n-type semiconductor?
Options
- AHoles are majority carriers and trivalent atoms are dopants.
- BElectrons are majority carriers and trivalent atoms are dopants.
- CHoles are minority carriers and pentavalent atoms are dopants.
- DElectrons are minority carriers and pentavalent atoms are dopants.
Correct answer
C. Holes are minority carriers and pentavalent atoms are dopants.
Step-by-step solution
An n-type semiconductor is formed by doping a pure semiconductor with pentavalent impurities, which serve as donor atoms contributing free electrons. This results in electrons becoming the majority charge carriers, while holes remain as minority carriers due to their lower concentration from thermal generation. Assessing the options: A incorrectly identifies holes as majority carriers and trivalent atoms as dopants, which corresponds to p-type semiconductors. B correctly identifies electrons as majority carriers bu