61. What range of resistor values would you get when checking a transistor for forward- and reverse-biased conditions by an ohmmeter?
(a) 100 to a few k, exceeding 100 k
(b) Exceeding 100 k, 100 to a few k
(c) Exceeding 100 k, exceeding 100 k
(d) 100 to a few k, 100 to a few k
62. Which of the following can be obtained from the last scale factor of a curve tracer?
(a) hFE
(b) dc
(c) ac
(d) ac
63. In the saturation region the collector-base junction is ________-biased and the base-emitter junction is ________-biased for a transistor.
(a) reverse, forward
(b) forward, reverse
(c) reverse, reverse
(d) forward, forward
64. The base current is the ________ of the emitter and collector currents.
(a) sum
(b) difference
(c) product
(d) None of the above
65. The term bipolar reflects the fact that ________ and ________ participate in the injection process into the oppositely polarized material.
(a) holes, neutrons
(b) holes, electrons
(c) neutrons, electrons
(d) None of the above
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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…
- 555555555517. At what region of operation is the base-emitter junction forward biased and the base-collector junction reverse biased? (a) Saturation (b) Linear or active (c) Cutoff (d) None of the above
- 555555555587. One p-n junction of a transistor is ________-biased and the other one is ________-biased in the active region. (a) reverse, reverse (b) forward, forward (c) reverse, forward (d) None of the above
- 555555555586. In the cutoff region the collector-base junction is ________-biased and the base-emitter junction is ________-biased for a transistor. (a) reverse, forward (b) forward, reverse (c) reverse, reverse (d) forward, forward