Electrical Engineering XYZ MCQs
Which type of mobile charge carriers present in semiconductor diode;
- Electrons
- Holes
- Both of the above
- Neutrons
Correct answer: 3. Both of the above
Explanation: Semiconductor diodes are made from materials like silicon or germanium, which have a crystalline structure. In these materials, both electrons and holes can serve as charge carriers.
- Electrons: In the crystalline structure of a semiconductor material, some electrons have enough energy to move freely within the material. These are referred to as “free electrons” and can carry electric charge.
- Holes: When an electron moves from its position in the crystal lattice, it leaves behind an unfilled space called a “hole.” This hole can effectively move through the lattice as if it were a positively charged particle. So, holes can also carry electric charge.