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GATE EC 2020: Analog Quiz 6 (App update required to attempt this test)
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Question 1
In a transistor amplifier, change of 0.025V in signal voltage causes the base current to change by 15 µA and collector current by 1.2 mA. If collector and load resistances are of 6kΩ and 12kΩ, determine input resistance in kΩ.
Question 2
In a class A amplifier VCE (max) =12V and VCE (min) =1V. Then what is the conversion efficiency(in %) for series fed load?
Question 3
For the DC analysis of the Common-Emitter amplifier shown, neglect the base current and assume that the emitter and collector current are equal. Given that VT =25mV, VBE =0.7V, and the BJT output resistance r0 is practically infinite. Under these conditions, the Midband voltage gain magnitude.
Ac = |V0/Vi|V/V, is _____
Ac = |V0/Vi|V/V, is _____
Question 4
In a class B push pull amplifier if 30V peak signal is given to a 15Ω load where VCC=40V.Calculate efficiency and power dissipation respectively.
Question 5
Two identical transistors are cascaded as follows with β=100. The overall voltage gain would be
Question 6
Identify the type of feedback in the amplifier given below
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Mar 12ESE & GATE EC
