Electronic Circuits

101. The capacitors are considered _________ in the ac equivalent circuit of a transistor amplifier.

1. Open
2. Partially open
3. Short
4. Partially short

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102. The capacitors are considered _________ in the dc equivalent circuit of a transistor amplifier.

1. Short
2. Partially short
3. Open
4. Partially open

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103. The collector current in an common base configuration is equal to

1. Alpha times emitter current plus leakage current
2. Alpha times base current plus leakage current
3. Beta times emitter current plus leakage current
4. Beta times collector current plus leakage current

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104. The common base (CB) amplifier has a _________ compared to CE and CC amplifier.

1. Lower input resistance
2. Larger current gain
3. Larger voltage gain
4. Higher input resistance

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105. The coupling capacitor Cc must be large enough to _________ in an RC coupling scheme.

1. Pass dc between the stages
2. Dissipate high power
3. Prevent attenuation of low frequency
4. Prevent attenuation of high frequency

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106. The crystal oscillator frequency is very stable due to _________ of the crystal.

1. Rigidity
2. Ductility
3. High Q
4. Low Q

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107. The current gain of an emitter follower is

1. Equal to 1
2. Greater than 1
3. Less than 1
4. Zero

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108. The current in any branch of a transistor amplifier that is operating is

1. ac only
2. the sum of ac and dc
3. the difference of ac and dc
4. dc only

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109. The driver stage usually employs _________ amplifier.

1. Class A power
2. Class C
3. Push-pull
4. Class AB

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110. The driver transformer has center- tapped secondary to provide

1. Forward bias to transistors of push-pull circuit
2. Two signals 180 degrees out of phase to transistors of push-pull circuit
3. Impedance matching
4. Two signals in phase with each other

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