12
Figure 2A.—Transistor symbology.
IN ANSWERING QUESTIONS 2-11
THROUGH 2-15, REFER TO FIGURE 2-A.
MATCH THE SYMBOL TO THE TERM
GIVEN IN THE QUESTION.
2-11. The symbol for base current.
1. H
2. D
3. C
4. B
2-12. The symbol for collector current.
1. A
2. C
3. G
4. H
2-13. The symbol for emitter current.
1. B
2. C
3. D
4. F
2-14. The symbol for collector voltage supply.
1. C
2. D
3. E
4. F
2-15. The symbol for base voltage supply.
1. E
2. F
3. G
4. H
2-16. In a transistor, what percent of the total
current flows through the emitter lead?
1.
100
2. 98
3. 60
4. 5
2-17. What are the majority current carriers in
(a) the PNP transistor and (b) the NPN
transistor?
1. (a) Holes
(b) holes
2. (a) Holes
(b) electrons
3. (a) Elements (b) holes
4. (a) Electrons (b) electrons
2-18. How will the transistor currents be
affected if the forward bias provided by
VBB is increased?
1. IB will decrease, IE will decrease, and
IC will decrease
2. IB will increase, IE will decrease, and
IC will decrease
3. IB will increase, IE will decrease, and
IC will increase
4. IB will increase, IE will increase, and
IC will increase
2-19. What device provides an increase in
current, voltage, or power of a signal
without appreciably altering the original
signal?
1. Diode
2. Amplifier
3. Oscillator
4. Power supply
2-20. The resistor that provides forward bias
for the emitter-base junction of a
transistor is indicated by which of the
following symbols?
1. RT
2. Rg
3. RL
4. RB
