Modes of Operation of Transistor

A transistor is connected in CE mode in which collector supply is $9 \mathrm{V}$ and the voltage drop across load resistance $R_L$ connected in the collector circuit is $1.0 \mathrm{V}$. If $R_L =1 \mathrm{K\Omega }$ and $\alpha =0.99$, determine base current in milliampere.

For a transistor in CE mode, $\beta = 50$ and voltage drop across $1 \mathrm{K\Omega }$ which is connected in the collector circuit is $2 \mathrm{volt}$. Find the base current in microampere.

In a common base circuit, a resistance of $1 \mathrm{K\Omega }$ is connected in the collector base section. The voltage drop across it is $1.2 \mathrm{V}$. Find the base current$\left(\mathrm{in} \mathrm{mA}\right)$  if $\alpha =0.96$.

For given $CE$ biasing circuit, if voltage across collector-emitter is $12 \mathrm{V}$ and current gain is $100$ and base current is $0.04 \mathrm{mA}$ then determine the value collector resistance $R_c$ in ohm.

For given $CE$ biasing circuit, if voltage across collector-emitter is $12 \mathrm{V}$ and current gain is $100$ and base current is $0.04 \mathrm{mA}$ then determine the value collector resistance $Rc.$

For a common-emitter transistor amplifier, the audio signal voltage across the collector resistance of $2 \mathrm{k\Omega }$ is $2 \mathrm{V}$. What should be the value of $R_{\mathrm{B}}$ in series with $V_{\mathrm{BB}}$  the supply of $2 \mathrm{V}$, if the $D.C.$ base current is $10$ times the signal current in $R_{\mathrm{B}}?\left( V_{\mathrm{BE}}=0.6\right.\mathrm{V}$, $\left.{\beta }_{\mathrm{ac}}\approx {\beta }_{\mathrm{dc}}=100\right)$

To operate a $n-p-n$ transistor in active region, its emitter-base and collector-base junction respectively, should be

If the current gain of a common base circuit is $0.97$, find the current gain of common emitter circuit.

The figure below shows, the transfer characteristics of a base biased $\mathrm{CE}$ transistor. Which of the following statement is true?

Draw the circuit arrangement and also explain the characteristics for a transistor in the common-emitter configuration. Also draw the curves and write the formula for voltage gain and current gain.

Current gain is maximum in the following configuration of a transistor:

In a common base transistor circuit, $I_C$ is the Output current and $I_E$ is the input current. The current gain ${\alpha }_{dc}$ is .........

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)

Assertion: In a CE transistor amplifier the input current is much less than output current.

Reason: The common emitter transistor amplifier has very high input impedance -

A transistor, connected in common emitter configuration, has input resistance $R_{\mathrm{in}}=2 \mathrm{k\Omega }$ and load resistance of $5 \mathrm{k\Omega }$. If $\beta =60$ and an input signal$12 \mathrm{mV}$ is applied, find the power gain.

A change of $8.0 \mathrm{mA}$ in the emitter current brings a change of $7.9 \mathrm{mA}$ in the collector current. The values of $\alpha \text{and} \beta$ are

A common emitter amplifier has a voltage gain of $50$, an input impedance of $100 \mathrm{\Omega }$ and an output impedance of $200 \mathrm{\Omega }.$ The power gain of the amplifier is

A common emitter amplifier has a voltage gain of 50, an input impedance of 100 $\mathrm{\Omega }$ and an output impedance of 200 $\mathrm{\Omega }.$ The power gain of the amplifier is

A common emitter amplifier has a voltage gain of $50$, an input impedance of $100 \mathrm{\Omega }$ and an output impedance of $200 \mathrm{\Omega }$. The power gain of the amplifier is

An $\mathrm{N}-\mathrm{P}-\mathrm{N}$ transistor in common emitter mode is used as a simple voltage amplifier with a collector current of $4 \mathrm{mA}$. The positive terminal of a $8 \mathrm{V}$ battery is connected to the collector through a load resistance $R_{\mathrm{L}}$ and to the base through a resistance $R_{\mathrm{B}}$. For collector–emitter voltage $V_{\mathrm{CE}}=4 \mathrm{V}$, base–emitter voltage $V_{\mathrm{BE}}=0.6 \mathrm{V}$and base current amplification factor ${\beta }_{\mathrm{d}.\mathrm{c}.}=100$. Calculate the values of $R_{\mathrm{L}}$ and $R_{\mathrm{B}}$.