Analog Circuits objective questions with answers part1

Q1. A high tuned circuit in a tuned amplifier permits it to have high
(A) Sensitivity
(B) Selectivity
(C) Fidelity
(D) Frequency range

Q2. The best circuit used to eliminate power frequency hum is
(A) Scratch filter
(B) Speech filter
(C) Octave filter
(D) Rumble filter

Q3. Which of the following op-amp system is non linear
(A) Active filter
(B) Voltage follower
(C) Voltage to current converter
(D) Sample and hold circuit

Q4. A class C amplifier is biased to operate for
(A) More than 180 of the input signal cycle
(B) Less than 180 of the input signal cycle
(C) 360 of the input signal cycle
(D) None of these

Q5. Improper biasing of transistor results in
(A) Distortion in output signal
(B) Excessive heating at collector terminal
(C) Heavy loading of emitter terminal
(D) All of the above

Q6. Positive feedback leads to
(A) Stability in the gain of the amplifier
(B) Decrease the gain of the amplifier
(C) Instability in the gain of the amplifier
(D) None of these

Q7. Negative feedback is
(A) Direct feedback
(B) Regenerative feedback
(C) Inverse feedback
(D) None of these

Q8. An ideal op-amp has
(A) Infinite output impedance
(B) Zero output impedance
(C) Low voltage gain
(D) Zero input impedance

Q9. An operational amplifier is
(A) A direct coupled amplifier
(B) An indirect coupled amplifier
(C) A high gain amplifier
(D) Both A and C

Q10. In transistor amplifier CE mode is preferred because it provides
(A) Less energy loss
(B) More circuit balance
(C) Both voltage and current gain
(D) None of these

Q11. A transistor can be used as an amplifier in its
(A) Active region
(B) Saturation region
(C) Both saturation and active region
(D) Cut off region

Q12. Reverse saturation current in a transistor
(A) Increases with increase in temperature
(B) Decreases with increase in temperature
(C) Remains same with increase in temperature
(D) None of these

Q13. Most stable transistor circuit is
(A) Fixed bias circuit
(B) Voltage divider bias circuit
(C) Emitter stabilized bias circuit
(D) None of these

Q14. In linear region operation of transistor
(A) B-E junction is forward biased
(B) B-E junction is reverse biased
(C) C-B junction is reverse biased
(D) Both A and C

Q15. In a Half wave rectifier the best filter is
(A) C filter
(B) L filter
(C) Pi filter
(D) None of these

Q16. Practically efficiency is maximum for
(A) Bridge rectifier
(B) Centre tapped full wave rectifier
(C) Half wave rectifier
(D) Both A and B

Q17. Bridge rectifier is normally avoided
(A) In low voltage rectification
(B) In high voltage rectification
(C) In all types of voltage rectification
(D) In square wave rectification

Q18. A rectifier output is a
(A) Pure dc signal
(B) Pure ac signal
(C) Partial dc signal
(D) pulsating dc signal

Q19. Clamping circuit depend mostly on
(A) Capacitance of the circuit
(B) Resistance of the circuit
(C) Time constant of the circuit
(D) None of these

Q20. A positive half wave rectifier is a
(A) Positive clipper
(B) negative clipper
(C) negative clamper
(D) None of these