Question: A __________ device prevents the oscillation of the moving system and enables the latter to reach its final position quickly___________?

• 1. deflecting
• 2. controlling
• 3. damping
• 4. any of the above

Question: Which of the following instruments indicate the instantaneous value of the electrical quantity being measured at the time at which it is being measured ?

• 1. Absolute instruments
• 2. Indicating instruments
• 3. Recording instruments
• 4. Integrating instruments

Question: Which of the following essential features is possessed by an indicating instrument ?

• 1. Deflecting device
• 2. Controlling device
• 3. Damping device
• 4. All of the above

Question: Which of the following properties a damping oil must possess ?

• 1. Must be a good insulator
• 2. Should be non-evaporating
• 3. Should not have corrosive action upon the metal of the vane
• 4. All of the above

Question: If the power level of an amplifier reduces to half, the db gain will fall by___________?

• 1. 5 db
• 2. 2 db
• 3. 10 db
• 4. 3 db

Question: In the initial stages of a multistage amplifier, we use______________?

• 1. RC coupling
• 2. Transformer coupling
• 3. Direct coupling
• 4. None of the above

Question: A gain of 1,000,000 times in power is expressed by_____________?

• 1. 30 db
• 2. 60 db
• 3. 120 db
• 4. 600 db

Question: If a three-stage amplifier has individual stage gains of 10 db, 5 db and 12 db, then total gain in db is____________?

• 1. 600 db
• 2. 24 db
• 3. 14 db
• 4. 27 db

Question: Transformer coupling is generally employed when load resistance is______________?

• 1. Large
• 2. Very large
• 3. Small
• 4. None of the above

Question: _____________coupling provides the maximum voltage gain?

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