Transistors Questions

A transistor is operated in common emitter configuration at $V_C=2\text{V}$ such that a change in the base current from $100\mu \text{A}$ to $300\mu \text{A}$ produces a change in the collector current from $10\text{mA}$ to $20\text{mA}$. The current gain is:

Consider an $n$ -$p$ -$n$ transistor amplifier in common-emitter configuration. The current gain of the transistor is $100$. If the collector current changes by $1\text{mA}$, what will be the change in emitter current?

A transistor is operated in common-emitter configuration at $V_c=2\text{V}$ such that a change in the base current from $100\mu \text{A}$ to $200\mu \text{A}$ produces a change in the collector current from $5\text{mA}$ to $10\text{mA}$. The current gain is:

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

In a CE (Common Emitter) transistor amplifier, the audio signal voltage across the collector resistance of $2\text{k}\Omega$ is $2\text{V}$. If the base resistance is $1\text{k}\Omega$ and the current amplification of the transistor is $100$, the input signal voltage is:

Transfer characteristics [output voltage($V_0$) vs input voltage ($V_i$)] for a base biased transistor in CE configuration is as shown in the figure. For using transistor as a switch, it is used:

In a CE amplifier, the transistor used has transconductance $0.03\text{mho}$. If replaced with another having transconductance $0.02\text{mho}$, the voltage gain $G$ becomes:

The input signal given to a CE amplifier having a voltage gain of $150$ is $V_i=2\cos (15t+\frac{\pi }{3})$. The corresponding output signal will be:

A $npn$ transistor is connected in common emitter configuration in a given amplifier. A load resistance of $800\Omega$ is connected in the collector circuit and the voltage drop across it is $0.8\text{V}$. If the current amplification factor is $0.96$ and the input resistance of the circuit is $192\Omega$, the voltage gain and the power gain of the amplifier will respectively be:

For CE transistor amplifier, the audio signal voltage across the collector resistance of $2\text{k}\Omega$ is $4\text{V}$. If the current amplification factor of the transistor is $100$ and the base resistance is $1\text{k}\Omega$, then the input signal voltage is: