At bridge crossings and near the railway track ternary lead cables are used because they 

  • AAre of high tensile strength
  • BAre of low coefficient of thermal expansion
  • CAre of low specific gravity
  • DCan withstand shocks and vibrations 
Correct Answer : (C)

Are of low specific gravity

Hints :

Transmission line connects 


A 3-phase 4-wire system is commonly used for

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