A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω

A Common Emitter Amplifier Has A Voltage Gain Of 50 Physics Question

A common emitter amplifier has a voltage gain of 50, an input impedance of 100Ω and an output impedance of 200Ω. The power gain of the amplifier is

Options

(a) 500
(b) 1000
(c) 1250
(d) 50

Correct Answer:

1250

Explanation:

Power gain = voltage gain x current gain
= Vₕ . Iₕ = V₀ / Vᵢ . I₀ / Iᵢ
= V₀² / Vᵢ² . Rᵢ / R₀ = 50 x 50 x 100/200
= 2500 / 2 = 1250

Related Questions:

  1. In Young’s experiment, the ratio of maximum to minimum intensities of the fringe
  2. If the length of a closed organ pipe is 1.5 m and velocity of sound is 330 m/s,
  3. An astronomical telescope arranged for normal adjustment has a magnification of 6.
  4. A pure semiconductor behaves slightly as a conductor at
  5. The temperature of a body falls from 50⁰C to 40⁰C in 10 minute. If the temperature

Topics: Electronic Devices (124)
Subject: Physics (2479)

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

NEETLab Mobile App

Share this page with your friends

Be the first to comment

Leave a Reply

Your email address will not be published.


*