Question: The value of emitter capacitor CE in a multistage amplifier is about____________?

• 1. 1 µF
• 2. 100 pF
• 3. 0.01 µF
• 4. 50 µF

Question: RC coupling is generally confined to low power applications because of____________?

• 1. Large value of coupling capacitor
• 2. Low efficiency
• 3. Large number of components
• 4. None of the above

Question: An amplifier receives 0.1 W of input signal and delivers 15 W of signal power. What is the power gain in db?

• 1. 8 db
• 2. 6 db
• 3. 5 db
• 4. 4 db

Question: The gain of an amplifier is expressed in db because_____________?

• 1. It is a simple unit
• 2. Calculations become easy
• 3. Human ear response is logarithmic
• 4. None of the above

Question: The frequency response of transformer coupling is___________?

• 1. Good
• 2. Very good
• 3. Excellent
• 4. Poor

Question: 1 db corresponds to_____________change in power level?

• 1. 50%
• 2. 35%
• 3. 26%
• 4. 22%

Question: The lower and upper cut off frequencies are also called_____________frequencies?

• 1. Sideband
• 2. Resonant
• 3. Half-resonant
• 4. Half-power

Question: Transformer coupling provides high efficiency because___________?

• 1. Collector voltage is stepped up
• 2. resistance is low
• 3. collector voltage is stepped down
• 4. none of the above

Question: The noise factor of an ideal amplifier expressed in db is_____________?

• 1. 0
• 2. 1
• 3. 1
• 4. 10

Question: Transformer coupling is used for__________amplification?

• 1. Power
• 2. Voltage
• 3. Current
• 4. None of the above