A Best Way To Crack Gorenment Job Exams

Electronics Engineering Objective Questions { Semiconductor Physics and Diodes }

169. A semiconductor has ____ temperature coefficient of resistance
A. positive
B. zero
C. negative
D. none of the above
Discuss in Forum

170. The most commonly used semiconductor is
A. germanium
B. silicon
C. carbon
D. sulphur
Discuss in Forum

171. A semiconductor has generally _____ valence electrons.
Discuss in Forum

172. The resistivity of pure germanium under standard conditions is about
A. 6 x 104 L2 cm
B. 3 x 104 Sr2 cm
C. 3 x 106 SI cm
D. 6 x 10-4 LI cm
Discuss in Forum

173. When a pure semiconductor is heated, its 3V
A. goes up
B. goes down
C. remains the same
D. cannot say
Discuss in Forum

174. The strength of a semiconductor crystal resistance comes from
A. forces between nuclei
B. forces between protons
C. electron-pair bonds
D. none of the above
Discuss in Forum

175. When a penta valent impurity is added to a pure semiconductor, it becomes
A. an insulator
B. an intrinsic semiconductor
C. p-type semiconductor
D. n-type semiconductor
Discuss in Forum

Page 25 of 31

« 23 24  25  2627 »