Define apparent power, real power, and reactive power and their units.

• A. Real power P in watts (W), Reactive power Q in VAR, Apparent power S in VA.
• B. Real power in VA, Reactive power in W, Apparent power in J.
• C. Real power in W, Reactive power in W, Apparent power in W.
• D. Real power in J, Reactive power in J, Apparent power in J.

Answer: (D)