Electronics-Bipolar-Junction Transistors (BJT)
Electronics-Bipolar-Junction Transistors (BJT)
11. With low-power transistor packages, the base terminal is usually the:
- tab end
- middle
- right end
- stud mount
12. When a silicon diode is forward biased, what is VBE for a C-E configuration?
- voltage-divider bias
- 0.4 V
- 0.7 V
- emitter voltage
13. What is the current gain for a common-base configuration where IE = 4.2 mA and IC = 4.0 mA?
- 16.80
- 1.05
- 0.20
- 0.95
14. If a 2 mV signal produces a 2 V output, what is the voltage gain?
- 0.001
- 0.004
- 100
- 1000
15. The symbol hfe is the same as:
- mca12_1001a1.gif
- mca12_1001b1.gif
- hi-fi
- mca12_1001d1.gif
16. Most of the electrons in the base of an NPN transistor flow:
- out of the base lead
- into the collector
- into the emitter
- into the base supply
17. In a transistor, collector current is controlled by:
- collector voltage
- base current
- collector resistance
- all of the above
19. Often a common-collector will be the last stage before the load; the main function(s) of this stage is to:
- provide voltage gain
- provide phase inversion
- provide a high-frequency path to improve the frequency response
- buffer the voltage amplifiers from the low-resistance load and
20. For a C-C configuration to operate properly, the collector-base junction should be reverse biased, while forward bias should be applied to which junction?
- collector-emitter
- base-emitter
- collector-base
- cathode-anode