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Advantages of Three Phase System
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Advantages of Three Phase System

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Questions and Answers

What is the main benefit of using a three phase system for electrical power transmission?

  • No difference in cost
  • Smaller cross sectional area cables (correct)
  • Larger cross sectional area cables
  • No effect on cable size

    • Why is a three phase system preferable for operating AC motors?

  • Voltage is always zero
  • Voltage is unpredictable
  • Voltage is not zero at any instant of time (correct)
  • Voltage crosses zero multiple times

    • What is the disadvantage of using single phase voltage for operating AC motors?

  • No mechanical vibration
  • More stable operation
  • Higher efficiency
  • Mechanical vibration due to zero voltage at multiple instants (correct)

    • How does using a three phase system contribute to reducing power loss?

    <p>Smaller cross sectional area cables</p> Signup and view all the answers

    Why is smaller cross sectional area beneficial for power transmission?

    <p>Reduces cost and power loss</p> Signup and view all the answers

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