The log magnitude curve for a constant gain K is a horizontal straight line hori

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Question
The log magnitude curve for a constant gain K is a
Options
A. horizontal straight line
B. horizontal straight line of magnitude 20 log K decibels
C. an inclined line having slope K
D. an inclined line having slope -K

Correct Answer

horizontal straight line of magnitude 20 log K decibels

Explanation

The factor K in the numerator of G(j?) gives is straight line at 20 log₁₀ K in Bode plot.

Automatic Control Systems problems

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1. Stepper motors find applications in
Options
A. X-Y plotters
B. numerically controlled machining equipment
C. printers
D. all of the above

3. A negative feedback system has . The closed loop system is stable for
Options
A. K > 20
B. 15 < K < 19
C. 8 ? K ? 14
D. K < 6

5. Assertion (A): Potentiometers can not be used as error detectors in position control systems.
Reason (R): The resolution of a potentiometer places an upper limit on its accuracy
Options
A. Both A and R are correct and R is correct explanation of A
B. Both A and R are correct but R is not correct explanation of A
C. A is correct but R is wrong
D. R is correct but A is wrong

7. In an integral controller
Options
A. the output is proportional to input
B. the rate of change of output is proportional to input
C. the output is proportional to rate of change of input
D. none of the above

9. Whether a linear system is stable or unstable that it
Options
A. is a property of the system only
B. depends on the input function only
C. both (a) and (b)
D. either (a) or (b)

10. For very low frequencies, v₀/v_i in the given figure equals
Options
A. 1
B. 0
C. ?
D. 0.5

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