BJT » Exercise – 2
51. For a properly biased pnp transistor, let IC = 10 mA and IE = 10.2 mA. What is the level of IB?
(a) 0.2 A
(b) 200 mA
(c) 200 A
(d) 20.2 mA
52. Transistors are ________-terminal devices.
(a) 2
(b) 3
(c) 4
(d) 5
53. How many carriers participate in the injection process of a unipolar device?
(a) 1
(b) 2
(c) 0
(d) 3
54. Which of the following is (are) the terminal(s) of a transistor?
(a) Emitter
(b) Base
(c) Collector
(d) All of the above
55. List the types of bipolar junction transistors.
(a) ppn, npn
(b) pnp, npn
(c) npp, ppn
(d) nnp, pnp
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BJT » Exercise - 1 1. A BJT has …… PN junction. (a) 1 (b) 2 (c) 3 (d) 4 2. A BJT has : (a) One PN junction (b) Two PN junctions (c) Three PN junctions (d) Four PN junctions 3. The gate of FET is analogous to the …….. of BJT. (a) Emitter (b) Collector (c) Base (d) None of these 4. A BJT is ......... controlled and the FET is ......... controlled device. (a) Current, Current (b) Voltage, Voltage (c) Voltage, Current (d) Current, Voltage 5. BJT with hfe=200, Ib=10 mA and IC= 4 mA is operating in : (a) Active region (b) Cut-off region (c) Saturation region (d) None of these 6. Which of the following statements is/are correct ? I. The DC load line is steeper than AC load line. II. BJT is a voltage controlled device. (a) Statement I (b) Statement II (c) Both statements I & II (d) Either statement I or II 7. In which mode of BJT operation are both junction reverse biased : (a) active (b) saturation (c) cut-off (d) revers active 8. In which mode of BJT operation are both junction forward biased : (a) active (b) saturation (c) cut-off (d) revers active 9. In a bipolar junction transistor the base region is made very thin so that :…- DC Biasing BJTs » Exercise - 1 1. For the BJT to operate in the active (linear) region, the base-emitter junction must be ________-biased and the base-collector junction must be ________-biased. (a) forward, forward (b) forward, reverse (c) reverse, reverse (d) reverse, forward 2. For the BJT to operate in the saturation region, the base-emitter junction must be ________-biased and the base-collector junction must be ________-biased. (a) forward, forward (b) forward, reverse (c) reverse, reverse (d) reverse, forward 3. The cutoff region is defined by IB ________ 0 A. (a) > (b) < (c) (d) 4. Nota 5. Calculate VCE. (a) –4.52 V (b) 4.52 V (c) –9 V (d) 9 V 6. Determine the reading on the meter when VCC = 20 V, RC = 5 k, and IC = 2 mA. (a) 10 V (b) –10 V (c) 0.7 V (d) 20 V 7. Calculate VCE. (a) 4.52 V (b) –4.52 V (c) 4.48 V (d) –4.48 V 8. In a fixed-bias circuit, which one of the stability factors overrides the other factors? (a) S(ICO) (b) S(VBE) (c) S() (d) Undefined 9. In a voltage-divider circuit, which one of the stability factors has the least effect on the device…
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