Electronic Devices and Circuit Theory- Bipolar Junction Transistors
Electronic Devices and Circuit Theory- Bipolar Junction Transistors
1. A transistor amplifier has a voltage gain of 100. If the input voltage is 75 mV, the output voltage is:
- 1.33 V
- 7.5 V
- 13.3 V
- 15 V
2. For normal operation of a pnp BJT, the base must be ________ with respect to the emitter and ________ with respect to the collector.
- positive, negative
- positive, positive
- negative, positive
- negative, negative
3. When a transistor is used as a switch, it is stable in which two distinct regions?
- saturation and active
- active and cutoff
- saturation and cutoff
- none of the above
4. The term BJT is short for
- base junction transistor.
- binary junction transistor.
- both junction transistor.
- bipolar junction transistor.
5. For a silicon transistor, when a base-emitter junction is forward-biased, it has a nominal voltage drop of
- 0.7 V.
- 0.3 V.
- 0.2 V.
- VCC.
6. Refer to Figure 4-3. The measured voltage, VCE, is 20 V. The transistor is in
- saturation.
- cutoff.
- normal.
- not enough data.
7. What are the two types of bipolar junction transistors?
- npn and pnp
- pnn and nnp
- ppn and nnp
- pts and stp
8. What is the order of doping, from heavily to lightly doped, for each region?
- base, collector, emitter
- emitter, collector, base
- emitter, base, collector
- collector, emitter, base
9. The magnitude of dark current in a phototransistor usually falls in what range?
- mA
- µA
- nA
- pA
10. Refer to Figure 4-3. You measure VCE and find it nearly equal to zero. You now know that the transistor is
- operating in cutoff.
- operating normally.
- operating in saturation.
- operating below cutoff.