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Special Diodes – 2 – 1

51. In a PIN diode, the intrinsic layer sandwiched between the heavily doped P & N layers is :

(a) Heavily doped
(b) Lightly doped
(c) Very lightly doped
(d) Moderately dope

ANSWER

EXPLANATION

52. The tunnel effect was discovered in 1960 by :

(a) H.K. Onnes
(b) Deaver & Fairbank
(c) J. Bardeen
(d) Giaever

ANSWER

EXPLANATION

53. Zener breakdown results due to :

(a) Strong electric field across the junction
(b) Thermal decomposition
(c) Impact ionization
(d) Emission of free electrons

ANSWER

EXPLANATION

54. A crystal diode has ……..

(a) one pn junction
(b) two pn junctions
(c) three pn junctions
(d) none of the above

ANSWER

EXPLANATION

55. A crystal diode has forward resistance of the order of ……..

(a) k Ω
(b) Ω
(c) MΩ
(d) none of the above

ANSWER

EXPLANATION

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