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CIE-10 Quiz 7
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1: The emitter of an NPN transistor
is thinner than any of the other regions
is hollow
is doped with a Group 5 element from the periodic table
is made from P type material
2: The base of a PNP transistor
is thinner than any of the other regions
is hollow
is doped with a Group 3 element from the periodic table
is made from P type material
3: The collector of an NPN transistor
is thinner than any of the other regions
is hollow
is doped with a Group 3 material from the Periodic Table
is made from N type material
4: The transistor depends on _______ for its operation
sunlight
quantum physics
relatively impure silicon to start with
an unknown force
5: In general, the collector voltage is _________ with respect to the base voltage
higher
lower
reversed
opposed
6: According to the diagrams for lecture 17
the collector is large relative to the emitter
the collector is small relative to the emitter
is the same thickness as the base
is always P type material
7: In normal transistor operation the collector-base diode is __________ biased and the base-emitter diode is __________ biased.
forward, reverse
reverse, forward
reverse, reverse
forward, forward
8: A transistor is a(n) _______ operated device
power
voltage
current
resistance
9: On the transistor schematic symbol
There are four terminals
The emitter is the largest
The collector is the largest
The base is the largest
10: The ratio of collector current to base current
alpha
beta
gamma
delta
11: An amplifier that changes output for any change of input is called
Class A
Class B
Class C
Digital
12: A transistor's high frequency limitations is largely due to
high beta
low beta
internal inductance
internal capacitance
13: Typical smal signal transistor beta is
too low to measure
100-300
25-50
10-20
14: A transistor's collector-base diode is designed to zener
always
with high base current
never
intermittently
15: Ic = 8 mA. Ib = 50 uA. Beta =
2
6
160
320
16: Beta = 250 Ib = 24 uA Ic = __ mA
6
3
10
2
17: One trick the Brits played on the Germans during WWII involved
coaxial cable
carrots
fuzzy paint
detector diodes
18: An amplifier has a
high voltage power supply
very high input impedance
goesinta and a goesouta
dynamic transmogrification
19: To plot a load line, typically ______________ is plotted along the y axis and __________ is plotted along the x axis.
emitter current, collector voltage
emitter current, emitter voltage
collector current, emitter voltage
collector current, collector voltage
20: High input resistance and low output resistance is a characteristic of
a common collector amplifier
a common emitter amplifier
a common base amplifier
all amplifier configurations
21: In a common emitter amplifier, the amplifier gain is set by
the base current
the ratio of Rc to Re
the base feedback ratio
the collector impedance
22: In a transistor amplifier, the current through the bleeder base resistors is set to be about _____ time(s) the expected base current
1
10
100
1000
23: In Lab 22, what was the theoretical emitter voltage
450 mV
860 mV
1.2 volts
4.5 volts
24: About what was the theoretical mid-band voltage gain
2
7
14
21
25: If Rc and the Cob of the transistor form a low-pass filter, what will the upper corner frequency be for Cob of 8 pF
100 kHz.
200 kHz.
1 MHz.
2 MHz
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