A Best Way To Crack Gorenment Job Exams

ECE Objective Questions { Semiconductor Physics and Diodes }



92. The most important application of tunnel diodes is
A. as rectifiers (called tunnel rectifiers)
B. as voltage controllable devices
C. as switching device in digital circuits
D. none of these

93. The most important characteristic parameters of a tunnel diode are
A. forward and backward resistances
B. negative resistance value and voltage swing
C. voltage swing and (Ip/Iv) ratio
D. none of these

94.  In zener and avalanche breakdown diodes, current flow is due to
A. minority carriers
B. majority carriers
C. minority as well as majority carriers
D. none of these

95.  The breakdown that occurs in reverse bias conditions in a narrow junction diodes is
A. the zener breakdown
B. the avalanche breakdown
C. either zener or avalanche breakdown
D. none of these

96. The breakdown that occurs in reverse bias conditions in a wider junction diode is
A. zener breakdown
B. avalanche breakdown
C. either zener or avalanche breakdown
D. none of these

97. Temperature co-efficient of a breakdown diode
A. is defined as variation in breakdown voltage with temperature
B. is the rate of change of dynamic resist ance with temperature
C. is the ratio of change of power handling capability with temperature
D. none of these

98.  Zener breakdown diodes have
A. a positive temperature coefficient
B. a negative temperature coefficient
C. a breakdown voltage that is independent of temperature
D. none of these

Page 14 of 31

« 12 13  14  1516 »

Subjects