Transistor as an Amplifier

Two amplifiers $1$ and$2$  are connected in series. Find the output voltage if their voltage gains ${\mathrm{A}}_1$ and ${\mathrm{A}}_2$ are $20$ and $10$, respectively and input voltage is $50\mathrm{mV}$ ? 

A$\mathrm{P}–\mathrm{N}–\mathrm{P}$ Transistor is used in common emitter mode in an amplifier circuit. A change of $40\mu \mathrm{A}$ in the base current brings change of $2\mathrm{mA}$ in collector current and $0.04\mathrm{V}$ in base emitter voltage. Find voltage gain of the amplifier, if $6 K\Omega$ of load is used -

An $\mathrm{N}–\mathrm{P}–\mathrm{N}$ transistor is connected in common emitter configuration in which collector supply is $8 \mathrm{V}$ and the voltage drop across the load resistance of $800 \Omega$ connected in the collector circuit is $0.8\mathrm{V}$.  If current amplification factor $\frac{25}{26}$ is, Then collector – emitter voltage ${\mathrm{V}}_{\mathrm{CE}}$ and base current ${\mathrm{I}}_{\mathrm{B}}$ are respectively -

How do you increase the gain of a common emitter amplifier?

What is common base amplifier used for?

What is the current gain of a common-base amplifier?

For what purpose is a common base amplifier constructed?

What is a common base amplifier?

What is power gain in amplifier?

What is a common base amplifier?

What is the voltage gain of common-base amplifier?

What do you understand by the transconductance of a transistor amplifier?

Which one is the correct formula for the power gain of a CE amplifier?

In a transistor amplifier, the collector load resistance $R_L$ is $2 \mathrm{K\Omega }$ and input resistance $R_i$ is $1 \mathrm{K\Omega }$ . If the current gain is $50$, calculate voltage gain of the amplifier.

In a common-base transistor amplifier circuit $\beta =9$, input resistance is $100 \mathrm{\Omega }$ and output resistance is $2 \mathrm{K\Omega }$. The voltage gain of the current is 

In a common base mode of a transistor, the collector current is $5.488 \mathrm{mA}$ for an emitter current of $5.60 \mathrm{mA}$. The value of the base current amplification factor $\left(\beta \right)$ will be

Explain why is there a phase difference of $180°$ between the input signal voltage and the output signal voltage of a common emitter amplifier.

What is the phase relationship between the AC input and output voltages in a common emitter amplifier? What is the reason for the phase reversal?

Draw a neat circuit diagram for transistor as $C-E$ amplifier and explain its working.

What do you understand by amplification? Make the diagram of a PNP transistor common amplifier and explain the process of amplification and calculate the formula for voltage gain.