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A common emitter amplifier is designed with n-p-n transistor (α=0.99). The input impedence is 1kΩ and load is 10kΩ. The voltage gain will be
Options
(a) 9900
(b) 99
(c) 9.9
(d) 990
Correct Answer:
990
Explanation:
Voltage gain = β × Resistance gain
β = α/(1-α) = 0.99 / (1-0.99) = 99
Resistance gain = (10 × 10³) = 10
Voltage gain = 99 × 10 = 990
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Topics: Electronic Devices
(124)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Electrons used in an electron microscope are accelerated by a voltage of 25 kV
- To convert a 800 mV range millivoltmeter of resistance 40Ω into an ammeter of 100 mA
- The radioactivity of a certain material drops to 1/16 of the initial value in 2 hours.
- A device which converts electrical energy into mechanical energy is
- The molecular weight of a gas is 44. The volume occupied by 2.2 g of this gas
Topics: Electronic Devices (124)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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