What is the formula for calculating apparent power in an AC circuit?

Apparent power (S) = VI, measured in volt-amperes (VA).

Riddle: I am a power that oscillates between source and load, never doing useful work. What am I?

Reactive Power (Q)

True or False: A wattmeter measures reactive power.

False. A wattmeter measures real power only.

The relationship between real power (P), reactive power (Q), and apparent power (S) can be expressed using which theorem?

Pythagorean theorem: S² = P² + Q².

Fill in the blank: The cosine of the angle between voltage and current in an AC circuit is known as ______.

Power Factor

Which of the following factors contributes to low power factor? A) High load current B) Inductive loads C) Capacitive loads D) All of the above

B) Inductive loads

What is the primary function of a synchronous condenser in power factor improvement?

To draw leading current that neutralizes the lagging reactive component of the load.

Riddle: I am a type of power that measures voltage drop and current flow but is often ignored; I help maintain system efficiency. What am I?

Reactive Power (Q)

True or False: The Ferranti effect causes the receiving end voltage to drop below the sending end voltage under light load conditions.

False. The Ferranti effect causes the receiving end voltage to rise above the sending end voltage under light load conditions.

Fill in the blank: The method used to improve power factor by connecting capacitors in parallel with the load is called ______.

Power Factor Correction