WorksheetsQuiz 1
Total questions: 10
Worksheet time: 5mins
In a PN junction with no external voltage, the electric field between acceptor and donor ions is called
Peak
Barrier
Threshold
Path
In a P-N junction the potential barrier is due to the charges on either side of the junction, these charges are
Majority carriers
Minority carriers
Both (a) and (b)
Fixed donor and acceptor ions
In an unbiased PN junction
The junction current at equilibrium is zero as equal but opposite carriers are crossing the junction
The junction current is due to minority carriers only
The junction current reduces with rise in temperature
The junction current at equilibrium is zero as charges do not cross the junction
In a PN junction when the applied voltage overcomes the ........ potential, the diode current is large, which is known as .............
Barrier, forward bias
Reverse, reverse bias
Resistance, reverse bias
Depletion, negative bias
As the PN junction is forward biased
The depletion region decreases
Holes as well as electrons tend to drift away from the junction
The barrier tends to breakdown
None of the above
The diode is used in
Digital circuits
Detectors
Rectifiers
All of the above
In a zener diode
Negative resistance characteristic exists
Forward voltage rating is high
Sharp breakdown occurs at low reverse voltage
All of the above
The ripple factor of a half wave rectifier is
2
1.21
2.4
0.48
If the PIV rating of a diode is exceeded _________
the diode is destroyed poorly
the diode conducts
the diode behaves like a zener diode
none of the above
The maximum efficiency of a full wave rectifier is _____________?
40.6 %
46.4%
82.1 %
83.2 %
