Feedback System MCQs : This section focuses on the "Feedback System". These Multiple Choice Questions (MCQs) should be practiced to improve the Feedback System skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations.
Question 1
Difference between input signal and feedback signal is known as ____________
A. Feedback factor
B. Error signal
C. Output signal
D. Input signal
Question 2
Error signal in positive feedback system will be ____________ input signal.
A. Greater than
B. Lower than
C. Equal to
D. Negative of
Question 3
For a negative feedback system, A=3 and ?=2 and output impedance without feedback are 100?. What will be its total output impedance?
A. 14.3 ?
B. 700 ?
C. 33.33 ?
D. 50 ?
Question 4
In a feedback gain equation, what does the term ? stands for?
A. Feedback gain
B. Forward gain
C. Open loop gain
D. Closed loop gain
Question 5
In which of the following conditions, feedback gain (Af) become independent of forward gain (A)?
A. A?<<1
B. A?=1
C. A?>>1
D. A?=0
Question 6
Input impedance can be _______________ on application of negative feedback.
A. Increased
B. Decreased
C. Halved
D. Maintained constant
Question 7
Input impedance of a system is 50 ?, for the system to be negative feedback, which of the following can be its input impedance without feedback?
A. 50 ?
B. 60 ?
C. 40 ?
D. 100 ?
Question 8
Voltage gain improves on the application of negative feedback.
A. True
B. False
Question 9
Which of the following change has been happened to output impedance in the negative feedback system?
A. Increases
B. Decreases
C. No change
D. Negative
Question 10
Which of the following represents complete expression for a closed loop system?
A. A?
B. A/ A?
C. A/ (1+A?)
D. 1/ (1+A?)