1. .1 BJT is referred as bipolar junction transistor because
(A) Current flows due to minority charge carriers
(B) Current flows due to majority charge carriers
(C) None of these
(D) Current flows due to both minority & majority charge carriers
2. .2 Which region of a BJT has the lowest doping level?
(A) Emitter
(B) All of these
(C) Collector
(D) Base
3. .3 For correct biasing of a BJT, base-emitter junction should be
(A) Forward Biased
(B) Reverse Biased
(C) Both a & b
(D) None of these
4. .5 The ratio of collector current (IC) and the emitter current (IE) is
(A) Ai
(B) βDC
(C) AV
(D) αDC
5. .6 The ratio of collector current (IC) and the base current (IB) is
(A) αDC
(B) Ai
(C) AV
(D) βDC
6. .7 The processing of increasing amplitude of a signal linearly is called
(A) Amplification
(B) Rectification
(C) Switching
(D) None of these
7. .8 In common emitter amplifier, input is provided at
(A) None of these
(B) Emitter
(C) Collector
(D) Base
8. .9 In common collector amplifier, input is provided at
(A) Emitter
(B) Base
(C) Collector
(D) None of these
9. .10 In common base amplifier, input is provided at
(A) Base
(B) Emitter
(C) Collector
(D) None of these
10. .11 In common emitter amplifier, output is taken from
(A) Base
(B) Emitter
(C) Collector
(D) None of these
11. .12 In common collector amplifier, output is taken from
(A) Base
(B) None of these
(C) Collector
(D) Emitter
12. .13 In common base amplifier, output is taken from
(A) Base
(B) Emitter
(C) None of these
(D) Collector
13. .14 In common emitter amplifier, voltage gain is
(A) High
(B) Medium
(C) Low
(D) None of these
14. .15 In common collector amplifier, voltage gain is
(A) High
(B) Medium
(C) 1
(D) Low
15. .16 In common base amplifier, voltage gain is
(A) Low
(B) Medium
(C) High
(D) None of these
16. .17 When a BJT is working in cut-off region, it behaves as
(A) Open Switch
(B) Closed Switch
(C) Both a & b
(D) None of these
17. .18 When a BJT is working in saturation region, it behaves as
(A) Closed Switch
(B) Open Switch
(C) Both a & b
(D) None of these
18. .19 BJT will remain in cut-off region when
(A) BE junction is forward biased
(B) BE junction is reverse biased
(C) Both a & b
(D) None of these
19. .20 BJT will remain in saturation region when IB is ____ than IB(min).
(A) Less
(B) Greater
(C) Both a & b
(D) None of these
20. .21 In a transistor, collector current is controlled by:
(A) Collector resistance
(B) Collector voltage
(C) Base current
(D) All
21. .22 When a silicon diode is forward biased, what is VBE for a C-E configuration?
(A) 0.7V
(B) Emitter voltage
(C) Voltage-divider bias
(D) 0.4 V
22. .23 The CB configuration is used to provide which type of gain?
(A) Current
(B) Resistance
(C) Power
(D) Voltage
23. .24 When transistors are used in digital circuits they usually operate in the
(A) Active region
(B) Linear region
(C) Saturation and cutoff regions
(D) Breakdown region
24. .25 How much is the base-to-emitter voltage of a transistor in the "on" state?
(A) 0V
(B) Undefined
(C) 0.7mV
(D) 0.7V
25. .26 In which region are both the collector-base and base-emitter junctions forward-biased?
(A) Active
(B) Cutoff
(C) Saturation
(D) All of these
26. .27 Which is the most frequently used transistor configuration?
(A) Common-base
(B) Common-collector
(C) Emitter-base
(D) Common-emitter
27. .28 The emitter current is always:
(A) Greater than base current
(B) Less than collector current
(C) Greater than collector current
(D) (a) and (c)
28. .29 In cutoff, VCE is:
(A) Equal to VCC
(B) Maximum
(C) (a) and (b)
(D) Minimum
29. .30 In saturation, VCE is:
(A) 0.7 V
(B) Minimum
(C) Equal to VCC
(D) Maximum