Analog Electronics
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

1/11KΩ
5KΩ
11KΩ
1/5KΩ

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Analog Electronics
When a transistor is connected in common emitter mode, it with have

Low input resistance as well as output resistance
Negligible input resistance and high output resistance
High input resistance and low output resistance
Medium input resistance and high output resistance

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Analog Electronics
Which of the following statements is false?

Class AB operation cannot be used for a push pull audio power output phase
All of these
Push pull signals are equal and opposite in phase
A push pull output transformer has a centre-tapped primary

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