Practicing Success

Target Exam

CUET

Subject

Physics

Chapter

Semiconductors and Electronic Devices

Question:

In common emitter amplifier, the current gain is 62. The collector resistance and input resistance are 5kΩ and 500Ω respectively. If the input voltage is 0.01 V, the output voltage is:

Options:

0.62 V

6.2 V

62 V

0.01 V

Correct Answer:

6.2 V

Explanation:

$\frac{V_o}{V_i}=β=\frac{R_o}{R_i}=\frac{62×5×10^3}{500}=620$

$∴ V_o = 620V_i = 620×0.01 = 620$