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

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Definitions:

Sensory Neurons

Neurons responsible for converting external stimuli from the organism's environment into internal electrical impulses.

Motor Neurons

Motor neurons are nerve cells that transmit signals from the central nervous system to muscles or glands, causing them to contract or secrete.

Myasthenia Gravis

A chronic autoimmune neuromuscular disease that causes weakness in the skeletal muscles responsible for breathing and moving parts of the body.

Immunosuppressive Drugs

Medications used to inhibit or suppress the activity of the immune system, often used in organ transplantation and autoimmune diseases.