Why AC instead of DC for Electric Power Transmission?

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SUMMARY

Alternating Current (A.C.) is preferred over Direct Current (D.C.) for electrical power transmission due to its efficiency in long-distance travel. A.C. allows for high voltage and low current transmission, significantly reducing energy losses. Additionally, transformers, which rely on changing magnetic fields, are essential for stepping up and down voltage levels in A.C. systems, making them more cost-effective for large-scale power distribution.

PREREQUISITES
  • Understanding of electrical power transmission concepts
  • Familiarity with A.C. and D.C. characteristics
  • Knowledge of transformer operation and magnetic fields
  • Basic principles of voltage and current relationships
NEXT STEPS
  • Research the principles of high voltage transmission systems
  • Learn about transformer design and operation in A.C. systems
  • Explore the advantages of A.C. over D.C. in power distribution
  • Investigate energy loss calculations in electrical transmission
USEFUL FOR

Electrical engineers, power system designers, and students studying electrical engineering who seek to understand the advantages of A.C. transmission over D.C.

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Homework Statement


Explain why A.C. is used instead of D.C. to transfer electrical power from the generating station to the consumer.


Homework Equations





The Attempt at a Solution


To reduce the energy lost in long distance transmission. To reduce costs involved in transferring electrical power over long distances.



Above is the answer which I provided though the teacher said it wasn't specific enough and my answer should have included something about

a) high voltage, low current
b) transformers need changing magnetic fields

Was wondering if anyone could help? Thanks very much :smile:
 
Physics news on Phys.org
Thanks very much Rajini,

I'll take a look at that now.
 

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