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| 1 | Diodes are used when it is necessary to amplify voltage, current, or power. |
 | A) | True |
| B) | False |
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| 2 | The transistor can be used as an electronic switch in computer circuits. |
| A) | True |
| B) | False |
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| 3 | A transistor has three doped regions. |
| A) | True |
| B) | False |
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| 4 | In the npn transistor, the majority current carriers are free electrons in the emitter and collector. |
| A) | True |
| B) | False |
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| 5 | The emitter of a bipolar junction transistor is very thin and lightly doped. |
| A) | True |
| B) | False |
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| 6 | In a common-base connection, the base lead is common to both the input and output side of the circuit. |
| A) | True |
| B) | False |
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| 7 | The dc current gain of a transistor in the common-emitter connection is called dc alpha. |
| A) | True |
| B) | False |
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| 8 | The symbol hFE is also used to indicate the dc alpha of a transistor. |
| A) | True |
| B) | False |
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| 9 | When a transistor is saturated, further increases in base current produce no further increases in collector current. |
| A) | True |
| B) | False |
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| 10 | A control voltage or current is the . |
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| 11 | The most popular way to bias a transistor is with bias. |
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| 12 | When a transistor is saturated, VCE is approximately equal to . |
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| 13 | The region of transistor operation where the collector current is zero is called the region. |
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| 14 | The voltage rating, VEBO is the allowable emitter-base voltage with the collector open. |
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| 15 | In circuits, the transistor can be used as an electronic switch. |
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| 16 | For an transistor schematic symbol, the arrow on the emitter lead points outward. |
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| 17 | The symbol is also used to indicate the dc beta of a transistor. |
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| 18 | When checking a transistor with an ohmmeter |
| A) | base-emitter should be high resistance in both directions |
| B) | base-emitter should be high resistance one way and low the other |
| C) | base-collector should be low resistance in both directions |
| D) | collector-emitter should be low resistance in both directions |
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| 19 | A graph that allows a technician to determine all possible combinations of IC and VCE for a given amplifier is called the |
| A) | volt-amp characteristic curve |
| B) | Bode plot |
| C) | ac load line |
| D) | dc load line |
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| 20 | If a transistor is biased so that it is not operating in saturation or cutoff, it is said to be operating in the |
| A) | passive region |
| B) | active region |
| C) | nonlinear region |
| D) | bandpass region |
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| 21 | For silicon, the barrier potential for both the emitter-base and collector-base junctions equals approximately |
| A) | 0.4 V |
| B) | 0.7 V |
| C) | 1.414 V |
| D) | 3.414 V |
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| 22 | For a transistor to operate properly as an amplifier, the emitter-base is |
| A) | forward-biased and the collector-base is reverse-biased |
| B) | reverse-biased and the collector-base is forward-biased |
| C) | forward-biased and the collector-base is forward-biased |
| D) | reverse-biased and the collector-base is reverse-biased |
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| 23 | The dc alpha characteristic exhibited in the common base circuit is approximated at |
| A) | 1 |
| B) | 1.414 |
| C) | 3.414 |
| D) | 10 |
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| 24 | The region of transistor operation where the collector of a transistor acts like a current source is called the |
| A) | active region |
| B) | cutoff region |
| C) | breakdown region |
| D) | saturation region |
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| 25 | The amount that the power rating of a transistor must be reduced for each degree Celsius above 25°C is called the |
| A) | coefficient of coupling |
| B) | power factor |
| C) | derating factor |
| D) | reduction factor |