Special Diodes – 1 – 10

46. Tunnel diode is basically a junction diode with :

(a) High doping in p region alone
(b) High doping in n region alone
(c) High doping in both p and n regions
(d) Low doping in both p and n regions

ANSWER

EXPLANATION

47. In a tunnel diode, depletion layer width is of the order :

(a) 100 Angstroms
(b) 0.1 Micron
(c) 1 Micron
(d) 5 Microns

ANSWER

EXPLANATION

48. On increasing the current through the Zener diode by a factor of 2, the voltage across the diode :

(a) Gets doubled
(b) Becomes 4 times
(c) Becomes half
(d) Remains the same

ANSWER

EXPLANATION

49. The dynamic resistance of a Zener diode :

(a) Increases with increase in current
(b) Decreases with increase in current
(c) Decreases with decrease in current
(d) Is independent of variation in current

ANSWER

EXPLANATION

50. A voltage regulator is based on the principle of :

(a) Rectification
(b) Amplification
(c) Zener breakdown
(d) Avalanche breakdown

ANSWER

EXPLANATION

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