Semi-conductors with donor atoms and free electrons belong to the type________________?
(A) n
(B) p
(C) mix
(D) any of above
The especially designed semiconductor diodes used as indicator lamps in electronic circuits are___________?
(A) The switch
(B) The light emitting diode
(C) The photo diodes
(D) Solar cells.
The device or circuit used for conversion of A.C. into D.C. is called_______________?
(A) An amplifier.
(B) A rectifier
(C) Filtering circuit
(D) Converter.
The semiconductor diode can be used as a rectifier because _______________?
(A) It has low resistance to the current flow when forward biased & high resistance when reverse biased.
(B) It has low resistance to the current flow when forward biased.
(C) It has high resistance to the current flow when reverse biased
(D) Its conductivity increases with rise of temperatur
In the transistor schematic symbol, the arrow_______________?
(A) is located on the emitter
(B) is located on the base
(C) is locate on the collector
(D) points form north to south
To obtain an n-type semiconductor germanium crystal it must be doped with foreign atoms whose valency is_____________?
(A) 2
(B) 3
(C) 4
(D) 5
The operational amplifier is______________?
(A) A high gain amplifier
(B) A high-power amplifier
(C) A high resistance amplifier
(D) A low resistance amplifier
The alternating voltage is an example of_______________?
(A) A digital waveform
(B) An analogue waveform
(C) Discrete waveform
(D) None at all
The specially designed semi-conductor diodes used as fast counters in electronic circuits are______________?
(A) The light emitting diodes
(B) Photo diodes
(C) Photo voltaic cell
(D) Solar cells.
The device used for conversion of D.C. to A.C. is called______________?
(A) Converter
(B) A rectifier
(C) Inverter
(D) Oscillator