A common emitter amplifier has a voltage gain | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The voltage gain $A_V$ is given as $50$.Input resistance $R_i = 100 \ \Omega$.Output resistance $R_o = 200 \ \Omega$.The power gain $A_P$ of an am

Vedclass · Accepted Answer

$1250$

Vedclass · Answer

(B) The voltage gain $A_V$ is given as $50$.Input resistance $R_i = 100 \ \Omega$.Output resistance $R_o = 200 \ \Omega$.The power gain $A_P$ of an amplifier is defined as the product of voltage gain and current gain, or $A_P = A_V 	imes A_I$.Since $A_V = \beta 	imes \frac{R_o}{R_i}$, we can express power gain as $A_P = A_V 	imes \beta$.However, a more direct formula using the given parameters is $A_P = \frac{A_V^2 	imes R_i}{R_o}$ is incorrect; the standard relation is $A_P = \frac{V_{out} 	imes I_{out}}{V_{in} 	imes I_{in}} = A_V 	imes A_I$.Given $A_V = 50$, and assuming the current gain $\beta$ is related to the voltage gain by $A_V = \beta \frac{R_o}{R_i}$, we find $\beta = A_V 	imes \frac{R_i}{R_o} = 50 	imes \frac{100}{200} = 25$.Thus, power gain $A_P = A_V 	imes \beta = 50 	imes 25 = 1250$.

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

Similar Questions

In the circuit shown in the figure,the input voltage $V_i$ is $20\, V$,$V_{BE} = 0$,and $V_{CE} = 0$. The values of $I_B$,$I_C$,and $\beta$ are given by:

The current amplification factor and the collector current in a $CE$ transistor circuit are $100$ and $2.2 \text{ mA}$ respectively. Then the base current is (in $\mu A$)

In a common emitter amplifier,a change of $0.2 \text{ mA}$ in the base current causes a change of $5 \text{ mA}$ in the collector current. If the input resistance is $2 \text{ k}\Omega$ and the voltage gain is $75$,what is the load resistance used in the circuit?

In an $n-p-n$ transistor circuit,the collector current is $10 \, mA$. If $90 \%$ of the electrons reach the collector,then the emitter current will be:

In an experiment,the input characteristics are shown for a $CE$ configuration $n-p-n$ transistor for different output voltages. Based on the graph,which of the following is correct?

Vedclass Test Series

Exam Paper Generator

Online Exam Module