91. |
Reflection coefficient of the wave of load connected to a transmission line of surge impedance equal to that of transmission line is
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Answer:
Option (c) |
92. |
Surge voltage of 1000 kV is applied to an overhead transmission line with its receiving and open. If the surge impedance of the line is 500 Ω, then total surge power in the line is
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Answer:
Option (a) |
93. |
On an infinitely long transmission line, the attenuation coefficient α is expressed in terms of ratio K of the two voltages on km apart on the line, in bels/km.The value of this coefficient is given by
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Answer:
Option (d) |
94. |
A surge of 260 kV traveling in a line of natural impedance of 500 Ω arrives at the junction with two lines of natural impedance of 250 Ω and 15 Ω respectively. The voltage transmitted in the branch line is
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Answer:
Option (d) |
95. |
An overhead line with surge impedance of 400 Ω is terminated through a resistance R. A surge traveling over the line will not suffer any deflection at the junction, if the value of R is
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Answer:
Option (c) |
96. |
In overhead line with surge impedance of 400 Ω is connected to a transformer by a short length of cable of surge impedance of 100 Ω. If a rectangular wave of 40 kV travels along the line towards the cable than the voltage of the wave traveling from the junction of overhead line through the cable toward the transformer will be
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Answer:
Option (a) |
97. |
The coefficient of reflection for current for an open ended line is
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Answer:
Option (b) |
98. |
A short length of cable between the dead end tower and the power transformer
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Answer:
Option (b) |
99. |
Real part of propagation constant of a transmission line is
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Answer:
Option (a) |
100. |
Two transmission lines each having an impedance of 200 Ω is separated by a cable like, for zero reflection, the impedance of cable should be
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Answer:
Option (b) |