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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
- As per Bohr model, the minimum energy (in eV) required to remove an electron
- The flux linked with a coil at any intant t is given by ?=10t² – 50t + 250
- The value of coefficient of volume expansion of glycerin is 5 x 10⁻⁴ k⁻¹.
- If the unit of force and length are doubled, then unit of energy will be
- If the velocity of sound in air is 350 m/s, thent he fundamental frequency
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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