7. Which of the following not TRUE about resistance? When the length of the conductor is doubled, the resistance of the wire will be doubled. When the temperature increased in a metal conductor, the resistance will be also increased. When the resistivity of a conductor is reduced, its conductivity also reduced. Resistance is inversely proportional to the cross- sectional area of a conductor.

7. Which of the following not TRUE about resistance? When the length of the conductor is doubled, the resistance of the wire will be doubled. When the temperature increased in a metal conductor, the resistance will be also increased. When the resistivity of a conductor is reduced, its conductivity also reduced. Resistance is inversely proportional to the cross- sectional area of a conductor.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter4: Transmission Line Parameters

Section: Chapter Questions

Problem 4.3P: A transmission-line cable with a length of 2 km consists of 19 strands of identical copper...

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Similar questions

A transmission-line cable with a length of 2 km consists of 19 strands of identical copper conductors, each 1.5 mm in diameter. Because of the twist of the strands, the actual length of each conductor is increased by 5. Determine the resistance of the cable if the resistivity of copper is 1.72-cm at 20C.
One thousand circular mils or 1 kcmil is sometimes designated by the abbreviation MCM75C. Data for commercial bare-aluminum electrical conductors lists a 60 Hz resistance of 0.0080 ohm per kilometer at for a 793-MCM AAC conductor. Determine the cross-sectional conducting area of this conductor in square meters. Find the 60 Hz resistance of this conductor in ohms per kilometer at 50C.
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The spiraling is one of the factors which effect the resistance of the conductor. Select one: True False
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(b) A 3-phase, 50 Hz, 132 kV overhead line of length 150 km has conductors placed in ahorizontal plane. The diameter of the conductors is 20 mm and assume completetransposition arrangement is applied. (i) Analyse the charging current per phase when the conductors spacing are set at 4 m (ii) Investigate the range of conductor spacing that should be chosen in order to reducethe magnitude of the charging current per phase in Q2 (b)(i) by 5% or more.
11/ The horizontal component of the tension in the conductor is constant throughout the length of the conductor. Select one: True False
A solid cylindrical aluminum conductor 25 km long has an area of 336,400 circular mils. Obtain the conductor resistance at 20C and 50C. Find the AC resistance per Km of the cable at 50C. Assume a skin-effect correction factor of 1.02 at 50 Hz. The resistivity of aluminum at 20C is 2.8x10-8 Ωm