# Straight line asymptotic Bode magnitude plot for a certain system is shown in the given figure. What will be its transfer function

1.  4s/(1+s/4)(1+s/10)2

2.  4(1+s/4)/(1+s/10)2

3.  0.25/(1+s/4)(1+s/10)

4.  0.25/(1+s/4)(1+s/10)2

4

0.25/(1+s/4)(1+s/10)2

Explanation :
No Explanation available for this question

# A 3Φ, 50 Hz, 132 kV transmission line consists of conductor of 1.17 cm diameter and spaced equilaterely at a distance of 3m. The line conductors have smooth surface with value for m 0.96. The barometric pressure is 72 cm of Hg and temperature of 200C. The corona loss in foul weather condition will be

1.  3.12 kW/km/phase

2.  4.84 kW/km/phase

3.  8.70 kW/km/phase

4.  none of these

4

3.12 kW/km/phase

Explanation :
No Explanation available for this question

# Consider the following statements regarding the transfer function G(s) plotted in the given figure 1.G(s) has corner frequencies at ω=0.1,1 and 10. 2.G(s)=100(s+1)/s(s+10) 3.Magnitude of 20log10G(jω)? at ω=1000 is -20db. Which of these statements are correct?

1.  1,2 and 3

2.  1 and 2

3.  2 and 3

4.  1 and 3

4

1,2 and 3

Explanation :
No Explanation available for this question

# The surge impedance of a 400 km long overhead transmission line is 400 ohms. For a. 200km length of the same line, the impedance will be

1.  200Ω

2.  800Ω

3.  400Ω

4.  100Ω

5.

5

400Ω

Explanation :
No Explanation available for this question

# The insulation level Of 400 kV EHV overhead transmission line is decided on the basis of

1.  lightning overvoltage

2.  switching overvoltage

3.  corona inception voltage

4

switching overvoltage

Explanation :
No Explanation available for this question

# The insulation resistance of a cable of length 10 km is 1 MΩ. For a length of log km of the same cable, the insulation resistance will be

1.  1 MΩ

2.  10 MΩ

3.  0.1 MΩ

4.  0.01Ω

4

0.1 MΩ

Explanation :
No Explanation available for this question

# For a 500 Hz frequency excitation, a 50 km long power line will be modelled as

1.  short line

2.  medium line

3.  long line

4.  data is not sufficient decision

4

long line

Explanation :
No Explanation available for this question

# Bundled conductors are employed to

1.  reduce the Short circuit current

2.  improve system stability

3.  decreases system Stability

4.  increase the short circuit current

4

decreases system Stability

Explanation :
No Explanation available for this question

# An overhead line having a surge impedance of 400Ω is connected, in sereis with an underground cable having a surge impedance of 100Ω. If a source of 50 kV travels from the line end towards the line-cable junctions, the Value of the transmitted voltage wave at the junction is

1.  30 kV

2.  20 kV

3.  80kV

4.  -30 kV

4

20 kV

Explanation :
No Explanation available for this question

1.  takes negative VAr at sending end and zero VAr at receiving end

2.  takes positive VAr at sending end and zero VAr at receiving end

3.  has flat voltage profile and unity power factor at all points along it

4.  has sending end voltage higher than receiving end voltage and unity power factor at sending end

4