A Three-Phase Motor Is Connected to a 480V, 60-Hz Line

question 3

Multiple Choice

A three-phase motor is connected to a 480V, 60-Hz line. A clamp-on ammeter indicates a running current of 68A at full load, and a three-phase wattmeter indicates a true power of 40,277W. To solve this problem, first find the amount of apparent power in the circuit using the formula ____.

• A) VA = 1.732 / (EL x IL)
• B) VA = (EL x IL) / 1.732
• C) VA = 1.732(EL + IL)
• D) VA = 1.732 x EL x IL

---

Definitions:

Negative Expectations

The belief or anticipation that outcomes will be unfavorable or harmful, which can influence behavior and perception.

Top-down Processing

A cognitive process that starts with thoughts or expectations to make sense of information, rather than beginning with the sensory input.

Peripheral Vision

The part of vision that occurs outside the very center of gaze, allowing humans to perceive stimuli not in direct line of sight.

Prosopagnosia

A brain disorder marked by an inability to identify facial features.