46. Which one of the following is a unique characteristic of Schottky transistor ?
(a) Lower propagation delay
(b) Higher propagation delay
(c) Lower power dissipation
(d) Higher power dissipation
47. Higher switching speed is possible in Schottky transistor than ordinary N-P-N transistor due to :
(a) It operates in cut-off and saturation regions
(b) It operates in active and saturation regions
(c) It is prevented from going into saturation
(d) It is prevented from going into cut-off
48. When a transistor is turned from ON to OFF, the transistor comes to OFF state :
(a) Once the input signal is removed
(b) As soon as the input signal is reversed
(c) As soon as the power supply is switched off
(d) After the excess charge stored in the base region is removed
49. The device having closer characteristics with an ideal current source is :
(a) Vacuum diode
(b) Zener diode
(c) UJT
(d) Transistor in common base mode
50. In the symbol of transistor the arrow mark shows :
(a) Emitter
(b) Collector
(c) Base
(d) Gate
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