Question: The switch that has the fastest speed of operation is ____________ switch?

• 1. Electronic
• 2. Mechanical
• 3. Electromechanical
• 4. None of the above

Question: A relay is ___________switch?

• 1. A mechanical
• 2. An electronic
• 3. An electromechanical
• 4. None of the above

Question: For the same a.c. power output as above, what should be the minimum power rating of transistor for class B operation?

• 1. 10 W
• 2. 4 W
• 3. 8 W
• 4. None of the above

Question: The maximum a.c. power output from a class A power amplifier is 10 W. What should be the minimum power rating of the transistor used ?

• 1. 10 W
• 2. 15 W
• 3. 5 W
• 4. 20 W

Question: The class B push-pull circuit can deliver 100 W of a.c. output power. What should be the minimum power rating of each transistor ?

• 1. 20 W
• 2. 40 W
• 3. 10 W
• 4. 80 W

Question: Power amplifiers generally use transformer coupling because transformer permits______________?

• 1. Cooling of the circuit
• 2. Impedance matching
• 3. Distortionless output
• 4. Good frequency response

Question: The most important consideration in power amplifier is __________________?

• 1. Biasing the circuit
• 2. Collector efficiency
• 3. To keep the transformer cool
• 4. None of the above

Question: A transformer coupled class A power amplifier has a load of 100 O on the secondary. If the turn ratio is 10:1, what is the value of load appearing on the primary?

• 1. 5 kO
• 2. 20 kO
• 3. 100 kO
• 4. 10 kO

Question: Transformer coupling can be used in______________amplifiers?

• 1. Either power or voltage
• 2. Only power
• 3. Only voltage
• 4. None of the above

Question: An AF amplifier is shielded to ________________?

• 1. Keep the amplifier cool
• 2. Protect from rusting
• 3. Prevent induction due to stray magnetic fields
• 4. None of the above