The current amplification factor of a transistor in common emitter configuration is $80$. If the emitter current is $2.43 \text{ mA}$,then the base current is (in $\mu \text{A}$)

In a transistor,if $\frac{I_C}{I_E} = \alpha$ and $\frac{I_C}{I_B} = \beta$. If $\alpha$ varies between $\frac{20}{21}$ and $\frac{100}{101}$,then the value of $\beta$ lies between:

In a transistor circuit,when the base current is increased by $50 \mu A$ keeping the collector voltage fixed at $2 \ V$,the collector current increases by $1 \ mA$. The current gain of the transistor is

To use a transistor as an amplifier,which of the following conditions must be satisfied?

The output characteristics of an $n-p-n$ transistor represent,($I_C =$ collector current,$V_{CE} =$ potential difference between collector and emitter,$I_B =$ base current,$V_{BB} =$ voltage given to base,$V_{BE} =$ the potential difference between base and emitter)

For a transistor,$\frac{1}{\alpha_{DC}} - \frac{1}{\beta_{DC}}$ is equal to [where $\alpha_{DC}$ and $\beta_{DC}$ are current amplification factors].