BJT MCQ

41. In a Ge BJT, for usual value of the collector current, what is the order of the transistor α?

1. 0.99
2. 0.9
3. 0.5
4. 50

42. In a PNP transistor operating in the active region, which of the following is responsible for the main stream of current, in the base region?

1. Drift of holes
2. Diffusion of holes
3. Drift of electrons
4. Diffusion of electrons

43. With the positive probe on an NPN base, an ohmmeter reading between the other transistor terminals should be?

1. High resistance
2. Infinite
3. Open
4. Low resistance

44. To operate properly a transistor’s base-emitter junction must be forward biased with a reverse bias applied to which junction?

1. Collector-emitter
2. Base-emitter
3. Collector-base
4. Base-collector

45. In bipolar junction transistors, the type of configuration which will give both voltage gain and current gain is

1. CE
2. None of the options
3. CB
4. CC

46. For active region operation of NPN transistor

1. Emitter is positive with respect to base
2. Emitter is negative  with respect to base
3. Emitter is at same voltage as base
4. Base is at same voltage as collector

47. A BJT is said to be operating in the saturation region, if

1. B-E junction is reverse biased and B-C junction is forward biased.
2. B-E junction is forward biased and B-C junction reverse biased.
3. Both the junctions are forward biased.
4. Both the junctions are reverse biased.

48. Which of the following is the non-linear circuit parameter?

1. Condenser
2. Wire wound resistor
3. Transistor
4. Inductance

49. In a CE (common-emitter) transistor, V_cc= 12 V and the zero signal collector current is 1mA. Determine the operating point when collector load (R_c) is 6 kΩ

1. 6V, 1mA
2. 6V, 2mA
3. 12V, 1mA
4. 12V, 2mA

50. The current flow across the base-emitter junction of an n-p-n transistor consists of

1. Mainly electrons
2. Equal numbers of holes and electrons
3. Mainly holes
4. The leakage current