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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
- After 300 days, the activity of a radioactive sample is 5000 dps
- An ideal heat engine works between temperature T₁=500 K and T₂=375 K.
- Length of a string tied to two rigid supports is 40 cm. Maximum length
- A boat is sent across a river with a velocity of 8 km/h.If the resultant velocity
- The drive shaft of an automobile rotates at 3600 rpm and transmits 80 HP
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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