JEE Main 2022 · 29 Jun · Shift 1 · Physics Q58

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PhysicsInteger+4 / -1Question 58 of 90

A transistor is used in an amplifier circuit in common emitter mode. If the base current changes by 100 $\mu$ A, it brings a change of 10 mA in collector current. If the load resistance is 2 k $\Omega$ and input resistance is 1 k $\Omega$ , the value of power gain is $x\times10^4$ . The value of $x$ is ______.

Your answer

Answer and worked solution

Official answer: 2

Current gain $\beta=\frac{10\text{ mA}}{100\ \mu\text{A}}=100$ .

Power gain. $\beta^2\frac{R_L}{R_{in}}=10^4\times2=2\times10^4$ .

Answer: 2

Topics:Transistors

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JEE Main 2022 · 29 Jun · Shift 1, Physics question 58