WorksheetsSEMICONDUCTOR DEVICES
Total questions: 20
Worksheet time: 10mins
State the barrier potential of silicon diode at room temperature.
0.3V
0.7V
1V
2mV
identify the cause of the depletion layer
Ions
Barrier potential
Doping
Recombination
A non conducting diode occurs when ____________ biased.
Forward
Inverse
Poor
Reverse
Calculate the peak load voltage out of a bridge rectifier for a secondary of 15Vrms
9.2V
15V
19.8V
24.3V
The three terminals of the Bipolar Junction Transistor are base, ____________ and ____________.
anode, cathode
source, drain
collector, emitter
gate,collector
Choose the overall efficiency for Class C Amplifier.
25% to 30%
50% to 70%
70% to 80%
higher than 80%
Positive feedback in amplifier occurs when the feedback signal is _________ with the input signal.
in phase
forward biased
out of phase
reverse biased
MOSFETs are available in one of these two types which are
Depletion and Advance
Enhancement and Depletion
Linear and non linear
low and high
The maximum current for any JFET occurs when
VGS>0
VGS<0
VGS =0
none of the answer
TRIAC has ____________ terminals,
2 or 3
2
3 or 4
3
The P type semiconductor is produced by doping _______ atoms into a pure semiconductor.
Tetravalence
Electrovalence
Pentavalence
Trivalence
A P-N Junction acts as a closed switched when it ___________
cannot overcome its barrier voltage
has a wide depletion region
is reversed biased
has a low junction resistance
A JFET always operates when __________
The gate to source pn junction reverse biased
The gate to source pn junction is forward biased
The drain connected to ground
The gate connected to the source
Ideally, a DC load line is a straight line drawn on the collector characteristic curves between _________
The Q point and cutoff
The Q point and saturation
VCE cutoff and IC sat
IB =0, IB= IC/beta
Identify which statement below is FALSE about negative feedback in amplifiers?
It widen the separation between 3dB frequencies
It increase the gain bandwidth
It improves gain stability
It reduces distortion
The drain current in JFET is controlled by _____________
Voltage drop across channel
Depletion regions
Channel resistance
Reverse-bias at the gate
Normal SCRs switching ON depends to
base current
anode current
cathode current
gate current
A half wave rectifier consists of ___________.
One diode
Two diode
Three diode
Four diode
Which of the following is NOT a transistor configuration?
Anode configuration
Base configuration
Emitter configuration
Collector configuration
Identify the factor that determine whether the material is a conductor, a semiconductor or an insulator.
numbers of electron
numbers of shell
size of atom
numbers of electrons valence
