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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
- A capacitor of capacitance 100μF is charged by connecting it to a battery of voltage
- A particle moving along X-axis has acceleration f,at time t given by f=fₒ(1- t/T)
- If the ionisation energy for the hydrogen atom is 13.6 eV, the energy required
- A wire carrying current I has the shape as shown in adjoining figure. Linear parts
- The wavelength of kα, X-rays produced by an X-ray tube 0.76Å. The atomic number
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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