Electronic Devices and circuits Theory-Diode Applications
Electronic Devices and circuits Theory-Diode Applications
21. There is a small amount of current across the barrier of a reverse-biased diode. This current is called
- forward-bias current.
- reverse breakdown current.
- conventional current.
- reverse leakage current.
22. As the forward current through a silicon diode increases, the voltage across the diode
- increases to a 0.7 V maximum.
- decreases.
- is relatively constant.
- decreases and then increases.
23. Doping of a semiconductor material means
- that a glue-type substance is added to hold the material together.
- that impurities are added to increase the resistance of the material.
- that impurities are added to decrease the resistance of the material.
- that all impurities are removed to get pure silicon.
24. The forward voltage across a conducting silicon diode is about
- 0.3 V.
- 1.7 V.
- –0.7 V.
- 0.7 V.
26. What occurs when a conduction-band electron loses energy and falls back into a hole in the valence band?
- doping
- recombination
- generation
- [NIL]
27. The maximum number of electrons in each shell of an atom is
- 2.
- 2n2 where n is the number of the shell.
- 4.
- 8.
28. A silicon diode is forward-biased. You measure the voltage to ground from the anode at ________, and the voltage from the cathode to ground at ________.
- 0 V, 0.3 V
- 2.3 V, 1.6 V
- 1.6 V, 2.3 V
- 0.3 V, 0 V
29. The term bias in electronics usually means
- the value of ac voltage in the signal.
- the condition of current through a pn junction.
- the value of dc voltages for the device to operate properly.
- the status of the diode.