In a transistor circuit,the emitter-base circuit of a $n-p-n$ transistor is always

In the circuit shown in the figure,the current gain $\beta = 100$ for an $npn$ transistor. What should be the base resistor $R_B$ so that $V_{CE} = 5 \text{ V}$,given $V_{BE} = 0 \text{ V}$?

In a common emitter transistor amplifier, $AC$ current gain is $65$, the load resistance is $5400 \text{ }\Omega$ and input resistance of the transistor is $450 \text{ }\Omega$. The voltage gain is

The base current in a transistor circuit changes from $45 \mu A$ to $140 \mu A$. Accordingly, the collector current changes from $0.2 \text{ mA}$ to $4.0 \text{ mA}$. The gain in current is

For a common emitter transistor,if $\frac{I_{C}}{I_{E}}=0.95$,then the current gain is

In a transistor,the value of $\alpha$ varies between $\frac{20}{21}$ and $\frac{100}{101}$. Then the value of $\beta$ varies between