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Question 1. Which of the following amplifier circuit using junction transistor has the best gain?
  1.     Common base
  2.     Common emitter
  3.     Common collector
  4.     All have the same gain
Answer: Option B

Question 2. In all base driver amplifiers
  1.     ac collector voltage is 180° out of phase with ac base voltage
  2.     ac emitter voltage is 180° out of phase with ac base voltage
  3.     ac collector voltage is in phase with ac base voltage
  4.     none of the above
Answer: Option A

Question 3. The effective channel length of a mosfet in a saturation decreases with increase in
  1.     Gate voltage
  2.     Drain voltage
  3.     Source voltage
  4.     Body voltage
Answer: Option B

Question 4. Which of the following statements is false?
  1.     Push pull signals are equal and opposite in phase
  2.     Class AB operation cannot be used for a push pull audio power output phase
  3.     A push pull output transformer has a centre-tapped primary
  4.     All of the above
Answer: Option B

Question 5. In all base driver amplifiers
  1.     ac collector voltage is 180° out of phase with ac base voltage
  2.     ac emitter voltage is 180° out of phase with ac base voltage
  3.     ac collector voltage is in phase with ac base voltage
  4.     none of the above
Answer: Option A

Question 6. When a transistor is connected in common emitter mode, it with have
  1.     Negligible input resistance and high output resistance
  2.     High input resistance and low output resistance
  3.     Medium input resistance and high output resistance
  4.     Low input resistance as well as output resistance
Answer: Option C