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WorksheetsSemiconductor Devices
Total questions: 15
Worksheet time: 5mins
The forbidden energy gap for Silicon is of the order of
0.7 eV
0.3 eV
1.1 eV
10 eV
Which of the following acts as a donor impurity in doping process ?
Arsenic
Indium
Gallium
Boron
The reverse saturation current in a PN Junction diode is only due to _________________.
minority carriers
majority carries
negative ions
positive ions
Which of the following is a symbol of NPN transistor ?
Conductivity of semiconductor __________________ with increase in temperature.
increases
decreases
remains unchanged
This is a graph that is seen on CRO. How is it change after full wave rectification process?
LED is
Light Enhancing Diode
Light Emitting Diode
Light Emitting Detector
Light Enhancing Detector
The energy band in which free electrons exist is know as
first band
second band
conductive band
valence band
Let np and ne be the number density of holes and electrons respectively in a pure semiconductor. Then,
np < ne
np= ne
np > ne
none of above
What is the most common semiconductor material used for producing integrated circuits
Quartz
Silicon
Diamond
Tantalum
Who contribute to the current in a semiconductor
electrons only
holes only
negative ions
both electrons and holes
Component that Convert AC to DC and allow current to flow in one Direction
Capacitor
Diode
Inverter
Resistor
A transistor is said to be in active region, when
BE junction forward biased and BC junction reversed biased
BE junction forward biased and BC junction forward biased
BE junction reverse biased and BC junction reversed biased
none of above
What is the name of this component?
PN junction
LED
silicon
PNP
