Transistor Amplifier

What is the current gain of Common Base Amplifier

• Unity

• Infinity

• Greater than 1

• Less than 1

What is the meaning of first letter indicated in the transistor code BC107

• Germanium material used

• Antimony material used

• Silicon material used

• Indium material used

Which type of amplifier is used to operate the loud speaker

• IF amplifier

• RF amplifier

• Power amplifier

• Voltage amplifier

What is the efficiency of transformer coupled class A amplifier

• Less than 20%

• About 50%

• More than 60%

• Unity

What is the use of positive feedback in amplifiers

• To produce demodulation

• To produce oscillation

• To produce amplification

• To produce modulation

What will happen when the forward bias voltage across the PN junction is increased excessively

• Barrier width of junction increases

• Junction ruptured and short circuited

• Increases the cut in voltage

• No current flows through the junction

What is the status of the transistor in the circuit it V_CE = V_CC

• Acting as closed swich

• Acting as open swich

• Acting as amplifier

• Acting as oscillator

How can you confirm a transistor as defective

• By ohm meter testing

• By circuit testing

• By physical testing

• By voltage measurement

What is the overall base emitter voltage required to turn the darlington pair

• 0.3V

• 1.4V

• 0.7V

• 0.2V

Why the complementary symmetry amplifier is preferred over the other types of amplifier configuration

• To eliminate the transformer

• To get more voltage gain

• To get less distortion

• To minimize gain