What is the difference between transmission lines and distribution lines in an electrical power system? 

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  1. Transmission lines use single-phase systems, while distribution lines use three-phase systems. 
  2. Transmission lines operate at lower voltages than distribution lines. 
  3. Transmission lines carry electricity from generating stations to substations, while distribution lines transport power to end consumers. 
  4. Transmission lines have lower current carrying capacity compared to distribution lines. 

Answer (Detailed Solution Below)

Option 3 : Transmission lines carry electricity from generating stations to substations, while distribution lines transport power to end consumers. 
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Detailed Solution

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Explanation:

The correct difference between transmission lines and distribution lines in an electrical power system is: Transmission lines carry electricity from generating stations to substations, while distribution lines transport power to end consumers.

  • Transmission lines are designed to transmit large amounts of electrical power over long distances from power plants or generating stations to substations.
  • On the other hand, distribution lines are responsible for transporting power from substations to end-users, such as residential, commercial, and industrial consumers.
  • This distinction in their roles reflects their respective positions in the overall power delivery system, with transmission lines handling bulk power transfer and distribution lines serving the localized distribution network.
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