AIPMT PRELIMS 2012 Physics Transistor Amplifiers MCQ Question
In a CE transistor amplifier, the audio signal voltage across the collector resistance of 2 kΩ is 2V. If the base resistance is 1 kΩ and the current amplification of the transistor is 100, the input signal voltage is
10 mV
0.1 V
1.0 V
1 mV
Correct Answer
Detailed Explanation
The input signal voltage Vᵢ can be calculated using the formula Vᵢ = V₀ / β, where V₀ is the output voltage and β is the current amplification. Given V₀ = 2V and β = 100, Vᵢ = 2V / 100 = 0.02V = 10 mV.
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