Physics- Semiconductor Electronics Materials, Devices and Simple Circuits

drift in forward bias, diffusion in reverse bias ✘ diffusion in forward bias, drift in reverse bias ✘ diffusion in both forward and reverse bias ✘ drift in both forward and reverse bias ✔

its resistance is increased ✘ it becomes a p-type semiconductor ✘ there will be more free electrons than holes in the semiconductor, ✘ none of these. ✔

Electrons are majority carriers and trivalent atoms are the dopants ✘ Electrons are minority carriers and pentava- lent atoms are the dopants. ✘ Holes are minority carriers and pentavalent atoms are the dopants. ✘ Holes are majority carriers and trivalent atoms are the dopants. ✔

metal ✘ semiconductor ✘ insulator ✘ none of these ✔

Van der Walls ✘ covalent ✘ ionic ✘ metallic ✔

Heisenberg uncertainty priniciple ✘ Pauli ✘ Bohr ✘ Boltzmann law ✔

increases exponentially with increasing band gaP ✘ decreases exponentially with increasing band gap ✘ decreases with increasing temperature. ✘ is independent of the temperature and band gap ✔

1.3 V ✘ 2.3 V ✘ 0.5 V ✔

holes move from lower energy level to higher energy level in the conduction band. ✘ electrons move from higher energy level to lower energy level in the conduction band. ✘ holes in the valence band move from higher energy level to lower energy level. ✘ holes in the valence band move from lower energy level to higher energy level. ✔

A, C ✘ B, D ✘ B, C ✘ A, D ✔