Special Diodes – 1 – 5

21. Tunnel diode, with its negative resistance characteristics can be employed for :

(a) Current amplification
(b) Voltage amplification
(c) Power amplification
(d) All of the above

ANSWER
Answer : (a)

EXPLANATION
No answer description available for this question. Let us discuss.

22. Match the following
P. SCR                              (I) Low current SCR without gate
Q. Triac                           (II) Low current SCR with gate
R. Schottky diode         (III) Uni-directional
S. SCS                             (IV) Bi-directional

(a) P – IV, Q – III, R – I, S – II
(b) P – I, Q – II, R – III, S – IV
(c) P – III, Q – IV, R – I, S – II
(d) P -I, Q – IV, R – II, S – III

ANSWER
Answer : (c)

EXPLANATION
No answer description available for this question. Let us discuss.

23. In a Zener diode :

(a) P & N regions are lightly doped
(b) The depletion region is wide
(c) P & N regions are heavily doped
(d) The junction field current is small

ANSWER
Answer : (c)

EXPLANATION
No answer description available for this question. Let us discuss.

24. In tunnel diode, the impurity concentration is in the order of :

(a) 1 part in 10^10 parts
(b) 1 part in 10^6 parts
(c) 1 part in 10^9 parts
(d) 1 part in 10^3 parts

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

25. Which diode is otherwise known as ESAKI diode ?

(a) PIN diode
(b) Schottky barrier diode
(c) GUNN diode
(d) Tunnel diode

ANSWER
Answer : (d)

EXPLANATION
No answer description available for this question. Let us discuss.

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