The voltage gain of the following amplifier is

The negative feedback in an amplifier

Which of the following is used to produce radio waves of constant amplitude?

An amplifier has a voltage gain $A_v = 1000$. The voltage gain in $dB$ is...........

The box in the circuit below has two inputs marked $V_{+}$ and $V_{-}$ and a single output marked $V_{o}$. The output obeys the following relation:
$V_{o} = \begin{cases} +10 \, V & \text{if } V_{+} > V_{-} \\ -10 \, V & \text{if } V_{+} < V_{-} \end{cases}$
Which of the following graphs represents the output $V_{o}$ as a function of time $t$?

Which of the following $p-n$ junction devices is not used in reverse bias?