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Physics · PYQ NEET UG 2017

हिन्दी

In a common emitter transistor amplifier, the audio signal voltage across the collector is \( 3\text{ V} \). The resistance of collector is \( 3\text{ k}\Omega \). If current gain is \( 100 \) and the base resistance is \( 2\text{ k}\Omega \), the voltage and power gain of the amplifier is

  1. A
    \( 200\text{ and }1000 \)
  2. B
    \( 15\text{ and }200 \)
  3. C
    \( 150\text{ and }15000 \)
  4. D
    \( 20\text{ and }2000 \)
View Answer & Solution

Correct answer · Option C

\( 150\text{ and }15000 \)

Explanation

Voltage gain \( A_v = \beta \frac{R_C}{R_B} = 100 \times \frac{3}{2} = 150 \). Power gain \( A_p = \beta \times A_v = 100 \times 150 = 15000 \).
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