What is the per unit system?

Q.  What is the per unit system (PU)?
- Published on 09 Oct 15

a. A ratio of actual value in any units to the base or reference value in the same units
b. A ratio of the base or reference value in any units to the actual value in the same units.
c. Ratio of the square of the actual value in any units to the square of base or the reference value in the same units
d. All of these

ANSWER: A ratio of actual value in any units to the base or reference value in the same units

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