Transistor amplifier

How the negative feedback is called?

• Regenerative feedback

• Degenerative feedback

• Current controlled feedback

• Voltage controlled feedback

Why NPN type of transistors are preferred over the PNP typ transistors?

• NPN has lower switching speed

• NPN has good bias stability

• NPN has higher switching speed

• Low operating voltage

What type of packaging is generally used to transistors utilized for low power amplification?

• Metal packaging

• Plastic Packaging

• Ceramic packaging

• with metal heat sink

Which type of amplifier in used to operate the loud speaker?

• IF amplifier

• RF amplifier

• Power amplifier

• Voltage amplifier

What is the voltage gain in a transistor if the input voltage in 40 mv and the output voltage in 3.6 V?

• 45

• 90

• 180

• 270

What is the input impedence of darlington pair transistors?

• Very low input impedence

• Very high input impedence

• Medium input impedence

• Uniter

Which type of amplifier has the frequency response curve as ?

• RC coupled amplifier

• LC coupled amplifier

• Direct coupled amplifier

• Transformer coupled amplifier

What is the frequency of operation of the amplifier circuit using inductance and capacitance coupling?

• Video signals

• High frequency signals

• Audio frequency signals

• Intermediate frequency signals

What is the purpose of using positive feedback in amplifiers?

• To produce modulation

• To produce demodulation

• To produce oscillation

• To produce multiplexion

How can you confirm that a transistors as defective?

• By circuit testing

• By ohm meter testing

• By physical testing

• By voltage measurements