# A unity feedback system has open-loop transfer function G(s) = 25 / [s(s + 6)]. The peak overshoot in the step-input response of the system is approximately equal to

1.  5%

2.  10%

3.  15%

4.  20%

4

10\%

Explanation :
No Explanation available for this question

# Determine the efficiency. Neglecting capacitance.

1.  94.7%

2.  90%

3.  85.2%

4.  50%

4

94.7\%

Explanation :
No Explanation available for this question

# The Nyquist plot of a loop transfer function G(jω)H(jω) of a system encloses the (- 1, j0) point. The gain margin of the system is

1.  less than zero

2.  zero

3.  greater than zero

4.  infinity

4

less than zero

Explanation :
No Explanation available for this question

# The voltage regulation of the line will be

1.  8.15%

2.  7.0%

3.  2%

4.  6.2%

4

8.15\%

Explanation :
No Explanation available for this question

# By a suitable choice of the scalar parameter K, the system shown the figure, can be made to, oscillate continuously at a frequency of

4

Explanation :
No Explanation available for this question

# The open-loop transfer fund ion of a unity feedback control system is G(s)=K(s+ 2) /(s + 1)(s -7) For K > 6, the stability characteristic of the open-loop and closed-loop configurations of the system are respectively

1.  stable and unstable

2.  stable and stable

3.  unstable and stable

4.  unstable and unstable

4

unstable and stable

Explanation :
No Explanation available for this question

# A400 volts, 3-Φ, 4 wire service mains supplies a star connected load. The resistance of each line is 0.1Ω and that of neutral 0.2Ω. The load impedance are ZR = (6 + j9), ZY = 8Ω, and ZB = (6 - j8). The current in the neutral will be

1.  45.18 Amp

2.  42.1 Amp

3.  40 Amp

4.  50.1 Amp

4

45.18 Amp

Explanation :
No Explanation available for this question

# The forward-path transfer function of a unity feedback system is G(s)= K(s2 - 4)/ s2 + 3 For the system to be stable the range of K is

1.  K > -1

2.  K < 3/4c

3.  -1

4.  marginal stable

4

marginal stable

Explanation :
No Explanation available for this question

# The unstable system is

1.  G(s)H(s)=K/ (T1s + 1)(T2s + 1); K>0

2.  G(s)H(s)= K(s+ 1)/ s2 (s + 4)(s + 5 ; K > 91

3.  G(s)H(s)=K(s + 2) /(s + 1)(s - 3) ; K > 2 K

4.  G(s)H(s)=K/(Ts + 1)3-1< K < 8

4

G(s)H(s)= K(s+ 1)/ s2 (s + 4)(s + 5 ; K > 91

Explanation :
No Explanation available for this question

1.  √3

2.  3

3.  4

4.  5

4