Semiconductor Materials » Exercise – 1
18. As the temperature increases in a semiconductor, the densities of the electrons and holes :
(a) Increase
(b) Decrease
(c) Become equal
(d) Can’t be defined
Subject Name : Electronics Engineering Exam Name : IIT GATE, UPSC ESE, RRB, SSC, DMRC, NMRC, BSNL, DRDO, ISRO, BARC, NIELIT
Posts Name : Assistant Engineer, Management Trainee, Junior Engineer, Technical Assistant
Electronics & Communication Engineering Books
GATE 2023 Total Info ENGG DIPLOMA UGC NET Total Info IES 2023 Total Info PSUs 2022 Total Info CSIR UGC NET Total Info JAM 2023 Total Info M TECH 2023 Total Info RAILWAY 2022 Total Info
Related Posts
Semiconductor Materials » Exercise - 4187. The conductivity of semiconductor : (a) Is independent of temperature (b) Varies inversely as temperature (c) Increases with increase in temperature (d) May increase or many decrease with rise in temperature- Semiconductor Materials » Exercise - 4 151. The addition of a very small quantity of aluminium to a silicon or germanium crystal makes it : (a) A good conductor (b) A good insulator (c) P-type semiconductor (d) N-type semiconductor 152. An intrinsic semiconductor at the absolute zero of temperature : (a) Behaves like a semiconductor (b) Behaves like an insulator (c) Has a few free electrons and same number of holes (d) Has a large number of holes and a few electrons 153. In a substance the conduction band and valence band are separated by a energy gap of the order of 1 eV, and there are at room temperature as money electrons in the conduction band as holes in the valence band. The substance is : (a) An intrinsic semiconductor (b) A p-type semiconductor (c) A N-type semiconductor (d) A doped semiconductor 154. The majority carriers of electricity in a p-type semiconductor are : (a) Free electrons (b) Holes (c) Both electrons and holes (d) Free ions 155. N-type semiconductor is obtained when silicon or germanium is doped by : (a) Phosphorus (b) Boron (c) Aluminium (d) Gallium 156. A p-type semiconductor is : 1. A silicon crystal doped with arsenic impurity. 2. A silicon crystal…
- Semiconductor Materials » Exercise - 124. When a semiconductor is heavily doped in a range of 1017 to 1018 impurity atoms/cm3, then it behaves as : (a) Intrinsic semiconductor (b) Extrinsic semiconductor (c) Simply as semiconductor (d) Degenerative semiconductor
- Semiconductor Materials » Exercise - 293. A semiconductor has generally ........ valence electrons. (a) 2 (b) 3 (c) 6 (d) 4
- Semiconductor Materials » Exercise - 290. A semiconductor is formed by ........ bonds. (a) covalent (b) electrovalent (c) co-ordinate (d) none of the above