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The input resistance of a silicon transistor is 100 W. Base current is changed by 40 µA which results in a change in collector current by 2mA. This transistor is used as a common emitter amplifier with a load resistance of 4 KΩ. The voltage gain of the amplifier is:
Options
(a) 2000
(b) 3000
(c) 4000
(d) 1000
Correct Answer:
2000
Explanation:
Voltage gain (Aᵥ) = Vₒᵤₜ / Vᵢₙ = Iₒᵤₜ / Iᵢₙ x Rₒᵤₜ / Rᵢₙ
Aᵥ = (2 x 10⁻³ / 40 x 10⁻⁶) x (4 x 10³ / 100)
= 2 x 100 = 2000
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Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A thin glass(refractive index 1.5) lens has optical power of -5D in air.
- An inclined plane makes an angle of 30° with the horizontal.A solid sphere
- A uniform chain of length L and mass m is kept on a smooth table. It is released
- A liquid wets a solid completely. The meniscus of the liquid in a sufficiently long
- The current through an inductor changes from 3 A to 2 A is 1 m/s. If induced e.m.f.
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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