In the given figure x6 = de(ax1 + bx2 + cx3) (a + b + c) (x1 + x2 + x3) (d + e)

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Correct Answer

de(ax₁ + bx₂ + cx₃)

Explanation

The input x₁ is multiplied by a, x₂, by b and x₃ by c. The sum total is multiplied by d and e.

Automatic Control Systems problems

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1. In the given figure the input is x(t) = A sin ?t. The steady state output y(t) =
Options
A. A sin (?t + ?) where ? = tan^-1 |G(j?)|
B. |G(j?)| A sin [?t + ?G(j?)]
C. |G(j?)| A sin [2?t + ?G(j?)]
D. A G(j?) sin [?t + ?G(j?)]

3. A stepper motor is
Options
A. a two phase induction motor
B. is a kind of rotating amplifier
C. is an electromagnetic transducer used to convert an angular position of shaft into electrical signal
D. is an electromechanical device which actuates a train of step angular movements in response to a train of input pulses on one to one basis

5. In a CE amplifier the input impedance is equal to the ratio of
Options
A. ac base voltage to ac base current
B. ac base voltage to ac emitter current
C. ac emitter voltage to ac collector current
D. ac collector voltage to ac collector current

6. The system in the given figure, has
Options
A. good gain and phase margin
B. poor gain and phase margin
C. good gain margin but poor phase margin
D. poor gain margin but good phase margin

9. The compensator of the given figure is a
Options
A. lag compensator
B. lead compensator
C. lag-lead compensator
D. none of the above

10. From the noise point of view, bandwidth should
Options
A. be large
B. not be too large
C. should be as large as possible
D. should be infinite

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