# Upper threshold voltage is

1.  0.9912V

2.  1.0042 V

3.  1.0094V

4.  0.9938 V

4

1.0042 V

Explanation :
No Explanation available for this question

# Lower threshold voltage is

1.  0.9932 V

2.  0.0093 V

3.  1.0012 V

4.  1.0056 V

4

0.0093 V

Explanation :
No Explanation available for this question

# For the digital circuit shown in figure, the output Q3 Q2 Q1 Q0 = 0001 initially. After a clock pulse appear the output Q3 Q2 Q1 Q0 will be

1.  0001

2.   0011

3.  0100

4.  1100

4

0011

Explanation :
No Explanation available for this question

# The output Qn of a J-K flip-flop is zero. It change to 1 when a clock pulse  is applied. The input Jn and Kn are respectively

1.  1 and X

2.  0 and X

3.  X and 0

4.  X and 1

4

1 and X

Explanation :
No Explanation available for this question

# The input-output transfer function of a plant H(s)=100/s(s+10)2. The plant is placed in a unity negative feedback configuration as shown in the figure below The gain margin of the system under closed loop unity negative feedback

1.   0 dB

2.  20 dB

3.  26 dB

4.  46 dB

4

26 dB

Explanation :
No Explanation available for this question

# Gc(s) is a lead compensator if

1.  a=1, b=2

2.   a=3, b=2

3.  a=-3, b=-1

4.   a=3, b=1

4

a=1, b=2

Explanation :
No Explanation available for this question

# The phase of the above lead compensator is maximum at

4

Explanation :
No Explanation available for this question

# For the feedback control system shown in the figure, the process transfer function is Gp(s)=1/s(s+1), and the application factor of the power amplifier is k≥0. The design specification required for the system, time constant is 1 sec and a damping ratio of 0.707 a. Find the desired locations of the closed loop poles b. Write down the required characteristic equation for the system. Hence determine the PD controller transfer function Gp(s) when K=1 c. Sketch the root-locus for the system

1.  -1+1j

2.  s+2

3.  -3.414

3

-3.414

Explanation :
No Explanation available for this question

# A linear second-order single –input continuous-time system is described by following set of differential equations x1(t)=-2x1(t)+4x2(t) x2(t)=2x1(t)-x2(t)+u(t) Where x1(t) and x2(t) are state variable and u(t) is the control variable. The system is

1.   Controllable and stable

2.  Controllable but unstable

3.  Uncontrollable and unstable

4.  Uncontrollable but stable

4

Uncontrollable but stable

Explanation :
No Explanation available for this question

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