Junction Transistor

An n – p – n transistor can be used to produce self-sustained oscillations.

The given statement is true of false:

Choose the correct expression for the current gain in n – p – n transistor in CE configuration:

Choose the correct expression for the current gain in n – p – n transistor in CE configuration:

In an n-p-n common emitter (CE) transistor the collector current changes from $5 \mathrm{mA}$ to $16 \mathrm{mA}$ for the change in base current from $100 \mu \mathrm{A}$ and $200 \mu \mathrm{A}$, respectively. The current gain of transistor is _____.

For a given transistor amplifier circuit in CE configuration $V_{CC}=1 \mathrm{V},R_C=1 \mathrm{k\Omega },R_b=100 \mathrm{k\Omega }$ and $\beta =100$. Value of base current $I_b$is

The collector current of a transistor is $1.50\mathrm{mA}$ and base current is $75\mu \mathrm{A}$. The current gain $\beta$ of the transistor is

The collector current of a transistor under separated conditions depends on

When a transistor is used as a Switch, it operates in the

If $I_{\epsilon }$ is the emitter current, $I_B$ the base current and $I_C$ the collector current of a transistor, then which of the following statements are NOT TRUE?

(i) $I_E\approx I_B\approx I_C$

(ii) $I_B<<I_E\approx I_C$

(iii) $I_C<<I_E\approx I_B$

(iv) $I_E<I_C\approx I_B$

The characteristics of an$n-p-n$ transistor in common emitter configuration is shown in the figure below. $I_B$ is the base current, $I_C$ is the collector current and $V_{CE}$ is the voltage at the collector with respect to the emitter. From the data shown here we may conclude

For a transistor in common emitter configuration, the emitter current is $1 \mathrm{mA}$ and the base current is $25 \mu \mathrm{A}.$ The ${\beta }_{dc}$ of the transistor is

The correct relationship between two current gains in a transistor is (where symbols have usual meanings)

The collector current is $10 \mathrm{mA}$ in $n-p-n$ transistor. If $80\%$ electrons emitted reach the collector then:

Find the value of the resistor $R_b$, if the base current in the transistor circuit shown in the figure is $35 \mathrm{\mu A}$.

Consider a common-base amplifier made by a $PNP$ transistor, the current gain is $0.96$ and emitter current is $7.2 \mathrm{mA}$. The base current is:

Read the following diagram and tell which of the following statements are true:-

The figure shows that transfer characteristics of a base biased common emitter transistor. Which of the following statements are not true for the configuration?

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 -