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1991-11-20
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228E-9.2 C 5-26 I = E/(R1+R2), I = 8/(16000+8000)|I = .333 mA, Vout = I*R2|V = 8000*.000333, V = 2.67
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 8-volts, R1
is 16 kilohms, and R2 is 8 kilohms?
A. R3 = 24 kilohms and V2 = 5.33 volts
B. R3 = 5.33 kilohms and V2 = 8 volts
C. R3 = 5.33 kilohms and V2 = 2.67 volts
D. R3 = 24 kilohms and V2 = 8 volts
*
229E-9.3 C 5-26 I = E/(R1+R2) = .33 mA, Vout = I*R2|V = 16E3*3.33E-3, V = 5.33
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 8-volts, R1
is 8 kilohms, and R2 is 16 kilohms?
A. R3 = 24 kilohms and V2 = 8 volts
B. R3 = 8 kilohms and V2 = 4 volts
C. R3 = 5.33 kilohms and V2 = 5.33 volts
D. R3 = 5.33 kilohms and V2 = 8 volts
*
230E-9.4 D 5-26 Rt = R1/2 (Parallel equals)|V2 = V1/2 (Divider equal)
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 10-volts, R1
is 10 kilohms, and R2 is 10 kilohms?
A. R3 = 10 kilohms and V2 = 5 volts
B. R3 = 20 kilohms and V2 = 5 volts
C. R3 = 20 kilohms and V2 = 10 volts
D. R3 = 5 kilohms and V2 = 5 volts
*
231E-9.5 C 5-26 With parallel resistors |Rt is less than smallest
ln Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 10-volts, R1
is 20 kilohms, and R2 is 10 kilohms?
A. R3 = 30 kilohms and V2 = 10 volts
B. R3 = 6.67 kilohms and V2 = 10 volts
C. R3 = 6.67 kilohms and V2 = 3.33 volts
D. R3 = 30 kilohms and V2 = 3.33 volts
*
232E-9.6 A 5-26 R3 is always less than either R1 or R2|R3 = R1*R2/(R1+R2), R3 = 1E4*2E4/3E4|V2 is always less than V1
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 10-volts, R1
is 10 kilohms, and R2 is 20 kilohms?
A. R3 = 6.67 kilohms and V2 = 6.67 volts
B. R3 = 6.67 kilohms and V2 = 10 volts
C R3 = 30 kilohms and V2 = 6.67 volts
D. R3 = 30 kilohms and V2 = 10 volts
*
233E-9.7 B 5-26 Rt = R1/2 (Parallel equals)|V2 = V1/2 (Divider equal)
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 12-volts, R1
is 10 kilohms, and R2 is 10 kilohms?
A. R3 = 20 kilohms and V2 = 12 volts
B. R3 = 5 kilohms and V2 = 6 volts
C. R3 = 5 kilohms and V2 = 12 volts
D. R3 = 30 kilohms and V2 = 6 volts
*
234E-9.8 B 5-26 R3 is always less than either R1 or R2|V2 is always less than V1
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 12-volts, R1
is 20 kilohms, and R2 is 10 kilohms?
A. R3 = 30 kilohms and V2 = 4 volts
B. R3 = 6.67 kilohms and V2 = 4 volts
C. R3 = 30 kilohms and V2 = 12 volts
D. R3 = 6.67 kilohms and V2 = 12 volts
*
235E-9.9 C 5-26 R3 is always less than either R1 or R2|V2 is always less than V1
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 12-volts, R1
is 10 kilohms, and R2 is 20 kilohms?
A. R3 = 6.67 kilohms and V2 = 12 volts
B. R3 = 30 kilohms and V2 = 12 volts
C. R3 = 6.67 kilohms and V2 = 8 volts
D. R3 = 30 kilohms and V2 = 8 volts
*
236E-9.10 C 5-26 Rt = R1/2 (Parallel equals)|V2 = V1/2 (Divider equal)
In Figure 4AE-9, what values of V2 and R3 result in the same
voltage and current characteristics as when V1 is 12-volts, R1
is 20 kilohms, and R2 is 20 kilohms?
A. R3 = 40 kilohms and V2 = 12 volts
B. R3 = 40 kilohms and V2 = 6 volts
C. R3 = 10 kilohms and V2 = 6 volts
D. R3 = 10 kilohms and V2 = 12 volts
*
237F-1.1 D 6-3 Semiconductor symbols|usually have an arrow
What is the schematic symbol for a semiconductor diode/rectifier?
|
A. ┌─ B. │
\ ──┴──
──/\/\/\/\/\/\─ ■
\ O
│
C. │ │ D.
───┤ ├─── ──├───
│ │
*
238F-1.2 A 6-1 Junction diodes are used for|high power applications and |point contact are use at VHF
Structurally, what are the two main categories of
semiconductor diodes?
A. Junction and point contact
B. Electrolytic and junction
C. Electrolytic and point contact
D. Vacuum and point contact
*
239F-1.3 D 6-6 Look for a Z
What is the schematic symbol for a Zener diode?
|
A. ─┐ B. │
──├─── │/
─┘ ──├───
│
C. D. ─┐
──│── ──├───
─┘ └─
*
240F-1.4 C 6-5 Voltage reference & regulator
What are the two primary classifications of Zener diodes?
A. Hot carrier and tunnel
B. Varactor and rectifying
C. Voltage regulator and voltage reference
D. Forward and reversed biased
*
241F-1.5 B 6-5 Constant voltage
What is the principal characteristic of a Zener diode?
A. A constant current under conditions of varying voltage
B. A constant voltage under conditions of varying current
C. A negative resistance region
D. An internal capacitance that varies with the applied
voltage
*
242F-1.6 A 6-6 To two hundred volts
What is the range of voltage ratings available in
Zener diodes?
A. 2.4 volts to 200 volts
B. 1.2 volts to 7 volts
C. 3 volts to 2000 volts
D. 1.2 volts to 5.6 volts
*
243F-1.7 C 6-6 "Arrows" are going into|a tunnel
What is the schematic symbol for a tunnel diode?
|
│
A. ──├─── B. │/
─┘ ──├───
│
─┐ │
C. ──│── D. ││/
─┘ ──┤ ├──
││
*
244F-1.8 C 6-6 Unusual resistance curve
What is the principal characteristic of a tunnel diode?
A. A high forward resistance
B. A very high PIV
C. A negative resistance region
D. A high forward current rating
*
245F-1.9 C 6-6 Tunnel
What special type of diode is capable of both amplification
and oscillation?
A. Point contact diodes
B. Zener diodes
C. Tunnel diodes
D. Junction diodes
*
246F-1.10 D 6-5 Look at drawing in book|VARiable-capACiTOR A|capacitor with an arrow
What is the schematic symbol for a varactor diode?
|
│ ─┐
A. │/ B. ──├───
──├─── └─
│
│
C. ││/ D. ──│├──
──┤ ├──
││
*
247F-1.11 A 6-4 VARiable-capACiTOR diode
What type of semiconductor diode varies its internal capacitance
as the voltage applied to its terminals varies?
A. A varactor diode
B. A tunnel diode
C. A silicon-controlled rectifier
D. A Zener diode
*
248F-1.12 B 6-4 Electronic variable cap.|VARiable-capACiTOR
What is the principal characteristic of a varactor diode?
A. It has a constant voltage under conditions of varying current
B. Its internal capacitance varies with the applied voltage
C. It has a negative resistance region
D. It has a very high PIV
*
249F-1.13 D 6-4 VARiable-capACiTOR
What is a common use of a varactor diode?
A. As a constant current source
B. As a constant voltage source
C. As a voltage controlled inductance
D. As a voltage controlled capacitance
*
250F-1.14 D 6-7 Mixers
What is a common use of a hot-carrier diode?
A. As balanced mixers in SSB generation
B. As a variable capacitance in an automatic
frequency control circuit
C. As a constant voltage reference in a power
supply
D. As VHF and UHF mixers and detectors
*
251F-1.15 B 6-3 Heating
What limits the maximum forward current in a junction
diode?
A. The peak inverse voltage
B. The junction temperature
C. The forward voltage
D. The back EMF
*
252F-1.16 D 6-3 PIV and forward current
How are junction diodes rated?
A. Maximum forward current and capacitance
B. Maximum reverse current and PIV
C. Maximum reverse current and capacitance
D. Maximum forward current and PIV
*
253F-1.17 C 6-7 RF detectors
What is a common use for point contact diodes?
A. As a constant current source
B. As a constant voltage source
C. As an RF detector
D. As a high voltage rectifier
*
254F-1.18 D 6-7 Point contact
What type of diode is made of a metal whisker touching a very
small semi-conductor die?
A. Zener diode
B. Varactor diode
C. Junction diode
D. Point contact diode
*
255F-1.19 C 6-4 PIN diodes are used as RF switches
What is one common use for PIN diodes?
A. As a constant current source
B. As a constant voltage source
C. As an RF switch
D. As a high voltage rectifier
*
256F-1.20 C 6-4 PIN diodes are used as RF switches
What special type of diode is often used in RF switches,
attenuators, and various types of phase shifting devices?
A. Tunnel diodes
B. Varactor diodes
C. PIN diodes
D. Junction diodes
*
257F-2.1 C 6-8 Bipolar transistors have a Base on the|left side of drawing and an Emitter on|the right(with arrow) Pointing-iN-Part
What is the schematic symbol for a PNP transistor?
|
/────
│ / \ ├──────
A. ────┤\ B. < │
│ > \│
\──── ├──────
/────
C. │ / D. \ ├──────
────┤\ > │
│ < \│
\──── ├──────
*
258F-2.2 B 6-8 NPN (Not-Pointing-iN) transistors have|an Emitter(with an arrow) on the right|Arrow always points to the N material
What is the schematic symbol for an NPN transistor?
|
/────
│ /
A. ├────── B. ────┤\
───>┤ │ >
├────── \────
/────
C. D. │ /
├────── ────┤\
───<┤ │ <
├────── \────
*
259F-2.3 B 6-8 Base, emitter & collector
What are the three terminals of a bipolar transistor?
A. Cathode, plate and grid
B. Base, collector and emitter
C. Gate, source and sink
D. Input, output and ground
*
260F-2.4 C 6-9 Ic/Ie
What is the meaning of the term alpha with regard to bipolar
transistors?
A. The change of collector current with respect to base current
B. The change of base current with respect to collector current
C. The change of collector current with respect to emitter current
D. The change of collector current with respect to gate current
*
261F-2.5 C 6-9 Alpha (α)
What is the term used to express the ratio of change in
DC collector current to a change in emitter current in a
bipolar transistor?
A. Gamma
B. Epsilon
C. Alpha
D. Beta
*
262F-2.6 A 6-9 Ic/Ib
What is the meaning of the term beta with regard to bipolar
transistors?
A. The change of collector current with respect to base current
B. The change of base current with respect to emitter current
C. The change of collector current with respect to emitter current
D. The change in base current with respect to gate current
*
263F-2.7 B 6-9 Beta (ß)
What is the term used to express the ratio of change in
the DC collector current to a change in base current in
a bipolar transistor?
A. Alpha
B. Beta
C. Gamma
D. Delta
*
264F-2.8 B 6-9 Common base upper frequency limit
What is the meaning of the term alpha cutoff frequency with regard
to bipolar transistors?
A. The practical lower frequency limit of a transistor in common
emitter configuration
B. The practical upper frequency limit of a transistor in common
base configuration
C. The practical lower frequency limit of a transistor in common
base configuration
D. The practical upper frequency limit of a transistor in common
emitter configuration
*
265F-2.9 B 6-9 Alpha cutoff
What is the term used to express that frequency at which the
grounded base current gain has decreased to 0.7 of the gain
obtainable at 1 kHz in a transistor?
A. Corner frequency
B. Alpha cutoff frequency
C. Beta cutoff frequency
D. Alpha rejection frequency
*
266F-2.10 B 6-9 Grounded(common) emitter
What is the meaning of the term beta cutoff frequency with regard
to a bipolar transistor?
A. That frequency at which the grounded base current gain has
decreased to 0.7 of that obtainable at 1 kHz in a transistor
B. That frequency at which the grounded emitter current gain has
decreased to 0.7 of that obtainable at 1 kHz in a transistor
C. That frequency at which the grounded collector current gain
has decreased to 0.7 of that obtainable at 1 kHz in a transistor
D. That frequency at which the grounded gate current gain has
decreased to 0.7 of that obtainable at 1 kHz in a transistor
*
267F-2.11 A 6-9 Junction region
What is the meaning of the term transition region with
regard to a transistor?
A. An area of low charge density around the P-N junction
B. The area of maximum P-type charge
C. The area of maximum N-type charge
D. The point where wire leads are connected to the P- or
N-type material
*
268F-2.12 A 6-8 Max. current
What does it mean for a transistor to be fully saturated?
A. The collector current is at its maximum value
B. The collector current is at its minimum value
C. The transistor's Alpha is at its maximum value
D. The transistor's Beta is at its maximum value
*
269F-2.13 C 6-10 No collector current
What does it mean for a transistor to be cut off?
A. There is no base current
B. The transistor is at its operating point
C. No current flows from emitter to collector
D. Maximum current flows from emitter to collector
*
270F-2.14 C 6-10 UJTs have an Emitter(with an arrow)|on the left side of drawing. Also|emitters are drawn at an angle
What is the schematic symbol for a unijunction transistor?
|
├──────
A. ├────── B. │ │
───>┤ ─────┘ ├─<─┐
├────── │ │ │
─────┘ ├───┴──
/────
C. \ ├────── D. │ /
< │ ────┤\
\│ │ >
├────── \────
*
271F-2.15 A 6-10 UJTs have an Emitter on |the left side of drawing
What are the elements of a unijunction transistor?
A. Base 1, base 2 and emitter
B. Gate, cathode and anode
C. Gate, base 1 and base 2
D. Gate, source and sink
*
272F-2.16 A 6-8 Best Below
For best efficiency and stability, where on the load-line
should a solid-state power amplifier be operated?
A. Just below the saturation point
B. Just above the saturation point
C. At the saturation point
D. At 1.414 times the saturation point
*
273F-2.17 B 6-1 Gold is a conductor and germanium|is a semiconductor
What two elements widely used in semiconductor devices
exhibit both metallic and non-metallic characteristics?
A. Silicon and gold
B. Silicon and germanium
C. Galena and germanium
D. Galena and bismuth
*
274F-3.1 D 6-11 A diode with a Gate
What is the schematic symbol for a silicon controlled rectifier?
|
├──────
A. │ │ B. │
─────┘ ├─<─┐ ││/
│ │ │ ──┤ ├──
─────┘ ├───┴── ││
├────── │
C. │ │ D. │/
│ ├─<─┐ ──├───
│ │ │ │
─────┘ ├───┴──
*
275F-3.2 A 6-10 A diode with a Gate|Diodes have anodes |and cathodes
What are the three terminals of an SCR?
A. Anode, cathode and gate
B. Gate, source and sink
C. Base, collector and emitter
D. Gate, base 1 and base 2
*
276F-3.3 A 6-11 On and off
What are the two stable operating conditions of an SCR?
A. Conducting and nonconducting
B. Oscillating and quiescent
C. Forward conducting and reverse conducting
D. NPN conduction and PNP conduction
*
277F-3.4 A 6-10 Junction diode with a Gate
When an SCR is in the triggered or on condition, its electrical
characteristics are similar to what other solid-state device
(as measured between its cathode and anode)?
A. The junction diode
B. The tunnel diode
C. The hot-carrier diode
D. The varactor diode
*
278F-3.5 D 6-10 On
Under what operating condition does an SCR exhibit electrical
characteristics similar to a forward-biased silicon rectifier?
A. During a switching transition
B. When it is used as a detector
C. When it is gated "off"
D. When it is gated "on"
*
279F-3.6 A 6-11 Parallel diodes to pass AC|With control Gate
What is the schematic symbol for a TRIAC?
|
├──────
A │ B. │ │
││/ │ ├─<─┐
──┤ ├── │ │ │
││ ─────┘ ├───┴──
│ \ ├──────
C. │/ D. < │
──├─── \│
│ ├──────
*
280F-3.7 A 6-11 Passes AC
What is the transistor called which is fabricated as two
complementary SCRs in parallel with a common gate terminal?
A. TRIAC
B. Bilateral SCR
C. Unijunction transistor
D. Field effect transistor
*
281F-3.8 B 6-11 Gate & Anodes
What are the three terminals of a TRIAC?
A. Emitter, base 1 and base 2
B. Gate, anode 1 and anode 2
C. Base, emitter and collector
D. Gate, source and sink
*
282F-4.1 B 6-12 Drawing is the same as a diode|With "light rays"
What is the schematic symbol for a light-emitting diode?
|
A. ─┐ B. ─┐ ─┐
┌─┬─┬─┬─┬─/─┬─┐ / /
│ │ │ │ / │ │ │ ───│───
/
C. D.
──│││── ───┤o o├───
─┘ ■
*
283F-4.2 C 6-12 20 mA & 1.7 volts
What is the normal operating voltage and current for
a light-emitting diode?
A. 60 volts and 20 mA
B. 5 volts and 50 mA
C. 1.7 volts and 20 mA
D. 0.7 volts and 60 mA
*
284F-4.3 B 6-12 Forward bias
What type of bias is required for an LED to produce
luminescence?
A. Reverse bias
B. Forward bias
C. Zero bias
D. Inductive bias
*