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Diodes and Applications problems
1. Providing a constant output regardless of ac input or load resistance changes is the function of a:
Options
A. transformer
B. filter
C. regulator
D. rectifier
Show Answer
Scratch Pad
Discuss
Correct Answer: regulator
2. What is wrong with this diode?
Options
A. open
B. short
C. nothing
D. not enough data
Show Answer
Scratch Pad
Discuss
Correct Answer: nothing
3. Electrons in the outermost orbit or shell of an atom are called
Options
A. free electrons
B. negative ions
C. valence electrons
D. conduction band electrons
Show Answer
Scratch Pad
Discuss
Correct Answer: valence electrons
4. Rectifier output polarity depends upon:
Options
A. cycles of input
B. capacitor polarity
C. half or full wave
D. diode installation
Show Answer
Scratch Pad
Discuss
Correct Answer: diode installation
5. What is the current through the zener diode?
Options
A. 0 mA
B. 7 mA
C. 8.3 mA
D. 13 mA
Show Answer
Scratch Pad
Discuss
Correct Answer: 7 mA
6. In a power supply diagram, which block indicates a pulsating dc output?
Options
A. transformer
B. filter
C. rectifier
D. regulator
Show Answer
Scratch Pad
Discuss
Correct Answer: rectifier
7. The diode schematic arrow points to the:
Options
A. trivalent-doped material
B. positive axial lead
C. anode lead
D. cathode lead
Show Answer
Scratch Pad
Discuss
Correct Answer: cathode lead
8. What is the current through the LED?
Options
A. 0 mA
B. 23 mA
C. 18 mA
D. 13 mA
Show Answer
Scratch Pad
Discuss
Correct Answer: 13 mA
9. The conduction band is closest to the valence band in
Options
A. semiconductors
B. conductors
C. insulators
D. The distance is the same for all of the above.
Show Answer
Scratch Pad
Discuss
Correct Answer: semiconductors
10. Thermal shutdown occurs in an IC regulator if:
Options
A. power dissipation is too high
B. internal temperature is too high
C. current through the device is too high
D. load resistance increases
Show Answer
Scratch Pad
Discuss
Correct Answer: internal temperature is too high
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More in Electronics:
Alternating Current and Voltage
Alternating Current vs Direct Current
Analog and Digital Converters
Analog to Digital
Arithmetic Operations and Circuits
Basic Op-Amp Circuits
Bipolar Junction Transistors (BJT)
Capacitors
Combinational Logic Circuits
Computer Hardware and Software
Diodes and Applications
Field Effect Transistors (FET)
Flip-Flops and Timers
Inductors
Logic Circuit Simplification
Logic Gates
Magnetism and Electromagnetism
Measurement, Conversion and Control
Number Systems and Codes
Ohm's Law
Operational Amplifiers
Parallel Circuits
Programmable Logic Devices (PLD)
Quantities and Units
RC Circuits
Resistance and Power
RL Circuits
RLC Circuits and Resonance
Semiconductor Memory
Semiconductor Principles
Sequential Logic Circuits
Series-Parallel Circuits
Series Circuits
Special-Purpose Op-Amp Circuits
Standard Logic Devices (SLD)
Testing and Troubleshooting
Thyristors and Tranducers
Time Response of Reactive Circuits
Transformers
Transistors and Applications
Voltage and Current
