A zener diode
Has sharp breakdown voltage
Is always reverse biased
Is used for voltage stabilisation
All of the above
In an intrinsic semi-conductor the hole mobility is
Greater than electron mobility
Less than electron mobility
Equal to electron mobility
Practically half of electron mobility
Zener breakdown occurs in junctions which are
Heavily doped and have narrow depletion layers.
Heavily doped and have wide depletion layers.
Lightly doped and have narrow depletion layers.
Lightly doped and have wide depletion layers.
A half-wave rectifier uses
One diode
Two diode
Three diode
Four diode
A full-wave rectifier uses
Two diodes only
Two diodes and also four diodes
Four diodes only
Only one diode
Bipolar Junction transistor is formed when
Two back-to-back p-n junctions are joined in a single piece
Two diodes are joined together
N-type of semi conductor is sandwiched between two layers of p-type material
Both (a) and (c)
The emitter region of a bipolar junction transistor is
Lightly doped
Heavily doped
Very lightly doped
None of the above
The primary condition for a transistor to conduct current is
Emitter-base junction should always be forward-biased
Collector-base junction should always be forward-biased
Emitter-base junction should always be reverse-biased
None of the above
/
IC/IE
IC/IB
-(IC – ICBO)/IE
IB/IE
An oscillator is an amplifier
With positive feedback
With negative feedback
Without positive feedback
None of the above