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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
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Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The ratio of specific heats Cp/Cv=γ in terms of degrees of freedom (n) is given by
- A light emitting diode(LED) has a voltage drop of 2 volt across it
- What will be the ratio of the distance moved by a freely falling body from rest in 4th
- A metal rod of length l cuts across a uniform magnetic field B with a velocity v.
- If the temperature of the sun were to increase from T to 2T and its radius from R and 2R
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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