Consider an amplifier circuit in which a tran | vedclass

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

Question

(C) Given: Load resistance $R_L = 3 k\Omega = 3000 \Omega$. Input voltage $V_i = 30 mV = 30 	imes 10^{-3} V$. Change in base current $\Delta I_B = 30

Vedclass · Accepted Answer

$30000$

Vedclass · Answer

(C) Given: Load resistance $R_L = 3 k\Omega = 3000 \Omega$. Input voltage $V_i = 30 mV = 30 	imes 10^{-3} V$. Change in base current $\Delta I_B = 30 \mu A = 30 	imes 10^{-6} A = 3 	imes 10^{-5} A$. Change in collector current $\Delta I_C = 3 mA = 3 	imes 10^{-3} A$. First, calculate the current gain $\beta$: $\beta = \frac{\Delta I_C}{\Delta I_B} = \frac{3 	imes 10^{-3}}{3 	imes 10^{-5}} = 100$. Next, calculate the input resistance $R_{in}$: $R_{in} = \frac{V_i}{\Delta I_B} = \frac{30 	imes 10^{-3}}{30 	imes 10^{-6}} = 1000 \Omega$. The power gain $A_P$ is given by the formula: $A_P = \beta^2 	imes \frac{R_L}{R_{in}}$. Substituting the values: $A_P = (100)^2 	imes \frac{3000}{1000} = 10000 	imes 3 = 30000$. Thus, the power gain is $30000$.

Similar Questions

$A$ $N-P-N$ transistor is connected in common emitter configuration (see figure) in which the collector voltage drop across the load resistance $(800 \; \Omega)$ connected to the collector circuit is $0.8 \; V$. The collector current is .............. $mA$.

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

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 input resistance is $2 \text{ k}\Omega$ and voltage gain is $75$, the load resistance used in the circuit is

For a $CE$ amplifier,current gain is $69$. If the emitter current is $7\, mA$,then the base current and collector current will be:

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

Vedclass Test Series

Exam Paper Generator

Online Exam Module