enlarging small signals

reducing a signal

converting an a.c. signal into d.c. signal

all the above stated purposes

pulse amplifier

linear amplifier

non-linear amplifier

none of these

the input impedance

the gain of the circuit

the frequency of the amplified signal

the input impedance and the gain of the circuit

Increased gain

Reduced input impedance

Voltage gain changes throughout the input cycle

All the above stated facts

large power amplifiers

medium power amplifiers

low power amplifiers

both medium and low power amplifiers