Chapter 4 BIPOLAR JUNCTION TRANSISTORS MCQs 29 min Score: 0 Attempted: 0/29 Subscribe 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 carriersShow All Answers 2. .2 Which region of a BJT has the lowest doping level? (A) Emitter (B) All of these (C) Collector (D) BaseShow All Answers 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 theseShow All Answers 4. .5 The ratio of collector current (IC) and the emitter current (IE) is (A) Ai (B) βDC (C) AV (D) αDCShow All Answers 5. .6 The ratio of collector current (IC) and the base current (IB) is (A) αDC (B) Ai (C) AV (D) βDCShow All Answers 6. .7 The processing of increasing amplitude of a signal linearly is called (A) Amplification (B) Rectification (C) Switching (D) None of theseShow All Answers 7. .8 In common emitter amplifier, input is provided at (A) None of these (B) Emitter (C) Collector (D) BaseShow All Answers 8. .9 In common collector amplifier, input is provided at (A) Emitter (B) Base (C) Collector (D) None of theseShow All Answers 9. .10 In common base amplifier, input is provided at (A) Base (B) Emitter (C) Collector (D) None of theseShow All Answers 10. .11 In common emitter amplifier, output is taken from (A) Base (B) Emitter (C) Collector (D) None of theseShow All Answers 11. .12 In common collector amplifier, output is taken from (A) Base (B) None of these (C) Collector (D) EmitterShow All Answers 12. .13 In common base amplifier, output is taken from (A) Base (B) Emitter (C) None of these (D) CollectorShow All Answers 13. .14 In common emitter amplifier, voltage gain is (A) High (B) Medium (C) Low (D) None of theseShow All Answers 14. .15 In common collector amplifier, voltage gain is (A) High (B) Medium (C) 1 (D) LowShow All Answers 15. .16 In common base amplifier, voltage gain is (A) Low (B) Medium (C) High (D) None of theseShow All Answers 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 theseShow All Answers 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 theseShow All Answers 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 theseShow All Answers 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 theseShow All Answers 20. .21 In a transistor, collector current is controlled by: (A) Collector resistance (B) Collector voltage (C) Base current (D) AllShow All Answers 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 VShow All Answers 22. .23 The CB configuration is used to provide which type of gain? (A) Current (B) Resistance (C) Power (D) VoltageShow All Answers 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 regionShow All Answers 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) 0.7VShow All Answers 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 theseShow All Answers 26. .27 Which is the most frequently used transistor configuration? (A) Common-base (B) Common-collector (C) Emitter-base (D) Common-emitterShow All Answers 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)Show All Answers 28. .29 In cutoff, VCE is: (A) Equal to VCC (B) Maximum (C) (a) and (b) (D) MinimumShow All Answers 29. .30 In saturation, VCE is: (A) 0.7 V (B) Minimum (C) Equal to VCC (D) MaximumShow All Answers
