PROBLEM SET 2.a
1. It is a circuit that uses two diodes to provide DC output voltage equal to twice the AC voltage
a. voltage doubler
b. voltage regulator
c. voltage multiplier
d. all of these
2.
In case a PN junction is forward biased
a. Holes and electrons seized to move
b. Electrons and holes move away from the junction
c. Electrons and holes move toward the junction
d. Depletion region decreases
3.
The bulk resistance of a diode is __________.
a. the resistance of N-material only
b. the resistance of P-material only
c. the resistance of the junction only
d. the resistance of the P and N material
4.
The light emitting diode produces light when
a. unbiased
b. forward bias
c. reverse bias
d. zero bias
5.
The PN junction offers
a. a high resistance in forward as well as reverse
direction
b. low resistance in forward as well as in reverse
c. conducts in forward direction only
d. conducts in reverse direction only
6.
A 60 Hz sine voltage is applied to the input of a half wave rectifier, what is the output
frequency?
a. 60 Hz
b. 120 Hz
c. 30 Hz
d. 180 Hz
7.
A diode that has a negative resistance is the __________.
a. Schottky diode
b. Tunnel diode
c. Laser diode
d. Hot – carrier diode
8. The small value of direct current that flows when a semiconductor device has a reverse bias
a. surge current
b. bias current
c. reverse current
d. current limit
9. What type of circuit would a zener diode is most likely used in?
a. voltage regulator
b. amplifier
c. oscillator
d. rectifier
10. A point in the characteristic curve of a diode where the current suddenly rises
a. peak voltage
b. knee voltage
c. valley voltage
d. trigger voltage
11. Determine the current I for each of the configurations of Fig. 2.134 using the
approximate equivalent model for the diode.
12. Determine Vo and ID for the networks below.
13. Determine V o and I D for the networks of Figure below.
14. Determine Vo1 and V o2 for the networks of Fig.
15. Determine V o and I D for the networks of Fig
16.
17. Determine vo for each network of Fig. 2.157 for the input shown.
(a) ---- - - - - - - - - - 2V - - - - - - - - -
18. Determine vo for each network of Fig. 2.158 for the input shown
(a) - - - - - - - - - - 2.2kohms - - - - - - - - (b) - - - - - - - - - - - 4V - - - - - - - - -
19. Describe in your own words the meaning of the word ideal as applied to a device or
system.
20. Describe the difference between n-type and p-type semiconductor materials.