Transistor as an Amplifier

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

CE and CB, both have the same  phase difference for input and output signal.

Which one of the given has $180°$ a phase difference in input and output signal?

For the CE amplifier, the phase difference between input and output single is not $90°$.

Due to $180°$ phase difference, the CE amplifier is known as _____.

In a common emitter amplifier circuit using an $\mathrm{n}-\mathrm{p}-\mathrm{n}$ transistor, the phase difference between the input and the output voltages will be:

In the following common emitter configuration, an $\mathrm{npn}$ transistor with a current gain $\beta =100$ is used. Find the value of output voltage of the 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 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

If the base and collector of a transistor are in forward biased, it is not used as a :-

In a $C.E.$ transistor amplifier, the audio signal voltage across the collector resistance of $2 k\mathrm{\Omega }$ is $2 \mathrm{V}.$ If the base resistance is $1 k\mathrm{\Omega }$ and the current amplification of the transistor is $100,$ the input signal voltage is :

If $\alpha$-current gain of a transistor is $0.98$. What is the value of $\beta$-current gain of the transistor?

To use a transistor as an amplifier 

The transistors provide good power amplification when they are used in

When the $\mathrm{n}-\mathrm{p}-\mathrm{n}$ transistor is used as an amplifier, then

An $n-p-n$ transistor is biased to work as an amplifier, which of the following statements is not correct?

In an npn transistor, $108$ electrons enter the emitter in ${10}^{-8}$ second. If $1\%$ electrons  entering to emitter are lost in the base, the fraction of current that enters the collector and current amplification factor are respectively:

For a $\mathrm{CE}$ amplifier, the current gain is$69$. If the emitter current is $7 \mathrm{mA}$, then the base current will be,

In an npn transistor, $108$ electrons enter the emitter in ${10}^{-8}$ second. If $1\%$ electrons are lost in the base,
the fraction of current that enters the collector and current amplification factor are respectively:

In given transistor circuit, at saturation mode $V_{BE}=0.8 \mathrm{V}, V_{CE}=0.2 \mathrm{V}$ and $\beta =100$. Then, the required value of $R_C$ for which transistor remains in saturation mode, will be:-