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
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
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
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
50. A voltage regulator is based on the principle of :
(a) Rectification
(b) Amplification
(c) Zener breakdown
(d) Avalanche breakdown
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