Q.1
The horizontal intercept of dc load line is the same as ideal
Q.2
A 741-type OP-amp has a gain-bandwidth product of 1MHz.A non-inverting amplifier using this opamp & having a voltage gain of 20db will exhibit -3db bandwidth of
Q.3
A differential amplifier is invariably used in the i/p stage of all OP-amps.This is dome basically to provide the OP-amps with a very high
Q.4
The early effect in a bipolar junction transistor is caused by
Q.5
In a transistor leakage current mainly depends on
Q.6
The encapsulation of transistor is necessary for
Q.7
Which of the following amplifier circuit using junction transistor has the best gain?
Q.8
When a transistor is connected in common emitter mode, it with have
Q.9
Asource follower using an FET usually has a voltage gain which is
Q.10
Three identical amplifiers with each one having a voltage gain of 50,input resistance of 1KΩ & output resistance of 250, are cascaded. The open circuit voltage gain of combined amplifier is
Q.11
A change in the value of the emitter resistance Re in a differential amplifier
Q.12
The bandwidth of an RF tuned amplifier is dependent on
Q.13
An amplifier without feedback has a voltage gain of 50,input resistance os 1 KΩ & Output resistance of 2.5KΩ.The input resistance of the current shunt negative feedback amplifier using the above amplifier with a feedbacik factor of 0.2 is
Q.14
The most commonly used amplifier in sample & hold circuits is
Q.15
In deriving ac equivalent circuit for an amplifier circuit we short circuit
Q.16
Thermal runaway is not possible in FET because as the temperature of FET increases
Q.17
In all base driver amplifiers
Q.18
The effective channel length of a MOSFET in a saturation decreases with increase in
Q.19
A dc power supply has no-load voltage of 30v,and a full-load voltage of 25v at full-load current of 1A.Its output resistance & load regulation ,respectively are
Q.20
In an OP-amp differentiator
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