Question: In practice, voltage gain is expressed______________?

• 1. In db
• 2. In volts
• 3. As a number
• 4. None of the above

Question: The final stage of a multistage amplifier uses______________?

• 1. RC coupling
• 2. Transformer coupling
• 3. Direct coupling
• 4. Impedance coupling

Question: RC coupling is not used to amplify extremely low frequencies because____________?

• 1. There is considerable power loss
• 2. There is hum in the output
• 3. Electrical size of coupling capacitor becomes very large
• 4. None of the above

Question: 1 db corresponds to_____________change in voltage or current level?

• 1. 40%
• 2. 80%
• 3. 20%
• 4. 25%

Question: A current amplification of 2000 is a gain of_________________?

• 1. 3 db
• 2. 66 db
• 3. 20 db
• 4. 200 db

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