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

Question: An advantage of RC coupling scheme is the___________?

• 1. Good impedance matching
• 2. Economy
• 3. High efficiency
• 4. None of the above

Question: In an RC coupled amplifier, the voltage gain over mid-frequency range_____________?

• 1. Changes abruptly with frequency
• 2. Is constant
• 3. Changes uniformly with frequency
• 4. None of the above

Question: RC coupling is used for_____________amplification?

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

Question: A radio receiver has____________of amplification?

• 1. One stage
• 2. Two stages
• 3. Three stages
• 4. More than one stages

Question: Artificial draught is produced by______________?

• 1. induced fan
• 2. forced fan
• 3. induced and forced fan
• 4. all of the above