1) Why do we use CE amplifier as a large signal class a amplifier? a) It has very high output impedance b) It has very high voltage gain 2) What does class A amplifier do? a) Delivers KV of voltage to load b) Delivers KW of power 3) What is the efficiency of Class A amplifiers? a) 30 or less b) 50 or less 4) An ideal large signal amplifier delivers 100% DC power to its load. a) True b) False 5) Which of the following statement is true about class A amplifiers? a) They are weak against distortions b) They supress noise signals 6) Why there is a need for heat sinks in Class A amplifier? a) To control heat dissipation b) To increase output resistance 7) Basic operation of Class A amplifiers____________ a) Millers law b) Switching transistor theory 8) If DC power for a Class A amplifier is 500W and AC power is 150W, what is its efficiency? a) 50% b) 30% 9) Which of the following technique is used to increase the efficiency of class A amplifier? a) By using matched transformers as load b) By using potentiometers as load 10) What is the conduction angle of class A amplifier? a) 90 b) 360

Batch 7

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