Basic Electricity 2, WASSCE (PC 2ND), 2019

Question 7

 

  1. Draw and label a three-phase star connected system.
  2.  

  3. Using the answer in 7(a), show how power is supplied to a:
    1. Single-phase consumer;
    2. Three-phase consumer.

Observation

The expected responses were:

 

  1. Labelled diagram of a three-phase star connected system
  2.  

    1. Labelled diagram of a three-phase star connected system

    2. Labelled diagram of a three-phase star connected system

    3. OR

      Labelled diagram of a three-phase star connected system

 

Many candidates who attempted this question did the extension well, managed to list advantages but could not list the devices.