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Electronics
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Diodes and Applications
Comments
Question
When checking a diode, low resistance readings both ways indicate the diode is:
Options
A. open
B. satisfactory
C. faulty
D. not the problem
Correct Answer
faulty
Diodes and Applications problems
Search Results
1. List three diode packages:
Options
A. clip package, DIP, small current package
B. DIP, small current package, large current package
C. small current package, large current package, and SIP
D. small current package, large current package, clip package
Show Answer
Scratch Pad
Discuss
Correct Answer: small current package, large current package, clip package
2. If a 169.7 V half-wave peak has an average voltage of 54 V, what is the average of two full-wave peaks?
Options
A. 119.9 V
B. 108.0 V
C. 115.7 V
D. 339.4 V
Show Answer
Scratch Pad
Discuss
Correct Answer: 108.0 V
3. Why is heat produced in a diode?
Options
A. due to current passing through the diode
B. due to voltage across the diode
C. due to the power rating of the diode
D. due to the PN junction of the diode
Show Answer
Scratch Pad
Discuss
Correct Answer: due to current passing through the diode
4. At any given time in an
intrinsic
piece of semiconductor material at room temperature
Options
A. electrons drift randomly
B. recombination occurs
C. holes are created
D. All of the above
Show Answer
Scratch Pad
Discuss
Correct Answer: All of the above
5. The dc current through each diode in a bridge rectifier equals:
Options
A. the load current
B. half the dc load current
C. twice the dc load current
D. one-fourth the dc load current
Show Answer
Scratch Pad
Discuss
Correct Answer: the load current
6. With a 12 V supply, a silicon diode, and a 370-ohm resistor in series, what voltage will be dropped across the diode?
Options
A. 0.3 V
B. 0.7 V
C. 0.9 V
D. 1.4 V
Show Answer
Scratch Pad
Discuss
Correct Answer: 0.7 V
7. A characteristic curve is the result of a current versus voltage plot of diode activity, which begins at the:
Options
A. 3rd quadrant
B. current plot
C. graph origin
D. voltage plot
Show Answer
Scratch Pad
Discuss
Correct Answer: graph origin
8. What circuit activity may shift a characteristic curve so that diode operating points are different?
Options
A. higher power (heat)
B. higher resistance
C. lower voltage
D. lower current
Show Answer
Scratch Pad
Discuss
Correct Answer: higher power (heat)
9. What is wrong with this circuit?
Options
A. The zener is open.
B. The zener is shorted.
C. nothing
D. not enough data
Show Answer
Scratch Pad
Discuss
Correct Answer: The zener is open.
10. What is the current through the diode?
Options
A. 1 mA
B. 0.975 mA
C. 0.942 mA
D. 0.0 mA
Show Answer
Scratch Pad
Discuss
Correct Answer: 1 mA
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