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Q9. A. Explain the term power factor correction; B. State advantages of PF correction; C. Explain, with the aid of a circuit diagram, how power factor correction can be effected using capacitors in a 3-phase circuit; D. state one method, other than the use of capacitors, by which power factor correction can be effected.

Q4. a) Explain the concept of power factor in electrical systems. Why is it important to maintain a high-power factor on board a ship? (8)

b) Discuss the methods used to correct power factor on ships. How does power factor correction improve the efficiency of the electrical system? (8)