Mixed Quiz (See related pages) 1 The impedance of a capacitor is directly proportional to the frequency and the capacitor effectively blocks ac voltage. A) True B) False 2 Coupling capacitors can be approximated as ac shorts. A) True B) False 3 The ac collector voltage of a common-emitter transistor circuit is inverted 360° out of phase with the input voltage. A) True B) False 4 A bypass capacitor is similar to a coupling capacitor because it appears open to ac and shorted to dc. A) True B) False 5 Integrated circuit means all components like resistors, capacitors, and transistors are created and connected on a chip, a piece of semiconductor material. A) True B) False 6 Distortion is undesirable in high-fidelity amplifiers because it changes the sound of voice and music. A) True B) False 7 One way to reduce distortion in a transistor amplifier is to keep the base ac input voltage large. A) True B) False 8 The ac equivalent circuit model called the Ebers-Moll looks like a T on its side and is sometimes called a T model. A) True B) False 9 The common-emitter amplifier can be recognized by noting that the emitter is at ac ground. A) True B) False 10 The common-collector amplifier has its at ac ground. 11 The impedance of a capacitor is proportional to the frequency. 12 A capacitor is used to connect an ac signal into an amplifier without disturbing its operating point. 13 The reactance of a coupling capacitor at dc voltage is . 14 The ac output voltage of an amplifier divided by the ac input voltage is referred to as the amplifier’s gain. 15 is the term that describes components such as resistors, capacitors, and transistors that are separately inserted and connected to get a final circuit. 16 The stretching and compressing of alternate half cycles at the output of a transistor amplifier is called . 17 In transistor amplifier notation, lowercase letters and subscripts are used for quantities. 18 In a well-designed coupling circuit, the coupling capacitor approximates A) an ac open B) a dc short C) a dc open D) an ac short 19 The ac output measured at the collector of a common-emitter amplifier is A) in phase with the input voltage B) 180° out of phase with the input voltage C) 270° out of phase with the input voltage D) 90° out of phase with the input voltage 20 When all components are simultaneously created and connected on a piece of semiconductor material, it is referred to as what kind of circuit? A) discrete B) integrated C) chat D) protection 21 Distortion is undesirable in high-fidelity amplifiers because A) it changes the sound of voice and music B) it amplifies the sound of voice and music C) it trips a circuit breaker D) cannot be heard in either speaker 22 The ac base-emitter voltage divided by the ac emitter current equals A) ac resistance B) dc resistance C) reactance D) impedance 23 The simplest way to analyze an amplifier is to split the analysis into what two parts? A) schematics and values B) amplifiers and oscillators C) dc and ac D) semiconductors and conductors 24 What is an amplifier called when its collector is at ac ground? A) common-emitter B) common-collector C) common-base D) common-amplifier 25 Coupling capacitors prevent the ac source and load resistance from A) changing the amplifier gain B) changing the operating point C) changing the supply voltage D) changing the input resistance
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