The number of times a particular waveform repeats itself in a given amount of time (frequency) is measured in ________
A) Coulombs B) Ersteads C) Hertz D) Watts
C
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The life safety branch of an EES provides power to _____.
a. alarm systems b. emergency rooms c. nurse call systems d. task illumination in intensive care units
The tool used to notch vinyl fencing is called
What will be an ideal response?
CO2 is an inert gas
Indicate whether the statement is true or false
A non–salient pole, three-phase, two-pole synchronous motor is connected in parallel with a three-phase, Y-connected load so that the per-phase equivalent circuit is as shown in Figure P19.46. The parallel combination is connected to a 220-V (line to line), 60-Hz, three-phase line. The load current IL is 25 A at a power factor of 0.866 inductive. The motor has XS = 2? and is operating with I f = 1 A and T = 50 N-m at a power angle of ?30°. (Neglect all losses for the motor.) Find IS , Pin (to the motor), the overall power factor (i.e., angle between I1 and VS ), and the total power drawn from the line.
