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WorksheetsElectronics Pre Requisite Knowledge Test
Total questions: 10
Worksheet time: 3mins
If the doping level of a crystal diode increases ,the breakdown voltage
Increases
Decreases
No change
Cant be Predicted
The efficiency of a half wave rectifier is-----------%
81.2
18.2
48.1
40.6
A pure semiconductor behaves like --------at absolute zero
Conductor
Insulator
P type Semiconductor
N type semiconductor
The leakage current in a diode is of the order of --------ampere
micro
milli
nano
pico
A trivalent impurity has ---------valance electrons
1
3
4
5
A hole and electron in a close proximity would tend to
repel each other
attract each other
have no effect on each other
None of the above
A semiconductor has ----------temperature coefficient of resistance
zero
positive
negative
none of the above
A crystal diode uses -------characteristics for rectification
Forward
Reverse
Both
None of the above
The knee voltage of a crystal diode is approximately equal to
breakdown voltage
barrier potential
applied voltage
forward voltage
A Zener diode has -------pn junction
three
zeo
two
one
