You’re Chief Financial Officer for a power company, and you consult your engineering department in an effort to minimize power-line losses. Your power plant produces 60-Hz power at 365 kV rms and 200 A rms, and delivers it via transmission lines with total resistance 100 Ω. You ask the engineers for the percentage of power that’s lost. They reply that it depends on the power factor. What’s the percentage loss for power factors of (a) 1.0 and (b) 0.60?
You’re Chief Financial Officer for a power company, and you consult your engineering department in an effort to minimize power-line losses. Your power plant produces 60-Hz power at 365 kV rms and 200 A rms, and delivers it via transmission lines with total resistance 100 Ω. You ask the engineers for the percentage of power that’s lost. They reply that it depends on the power factor. What’s the percentage loss for power factors of (a) 1.0 and (b) 0.60?
You’re Chief Financial Officer for a power company, and you consult your engineering department in an effort to minimize power-line losses. Your power plant produces 60-Hz power at 365 kV rms and 200 A rms, and delivers it via transmission lines with total resistance 100 Ω. You ask the engineers for the percentage of power that’s lost. They reply that it depends on the power factor. What’s the percentage loss for power factors of (a) 1.0 and (b) 0.60?
The rms current in a 25.0-0 resistor connected to an AC source is 2.00 A.
(a) What is the rms voltage across this resistor?
V
(b) What is the peak voltage of the AC source?
V
(c) What is the average power dissipated by the resistor?
W
(d) What is the maximum current across this resistor?
A
An AC voltage source is connected to a resistor R
1.15 x 102 Ω. The
output from an AC voltage source is given by the expression
V = (1.80 x 102 v) sin 2rft.
(a) What is the rms voltage across the resistor?
V
(b) What is the rms current flowing through the resistor?
A
The peak value of an alternating current in a 1800 −W device is 5.8 A. What is the rms voltage across it? Express your answer using two significant figures.
Chapter 28 Solutions
Essential University Physics: Volume 2 (3rd Edition)
Essential University Physics: Volume 1 (3rd Edition)
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