Find the percent increase in resistance at 60 Hz vs DC at 50 \deg C d) Find the percent increase in resistance at 60 Hz vs DC at 25 \deg C e) What do the results of parts c and d tell us about the line resistance?
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During the brownout, the power dissipated in conductors whose resistance is nearly independent of temperature a. decreases by approximately $10 \%.$ b. decreases by approximately $20 \%.$ c. decreases by approximately $5 \%.$ d. You can't tell without knowing the resistance.
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The Aluminum Electrical Conductor Handbook lists a DC resistance of 0.01558 ohm per 1000 ft (or 0.05112 ohm per km) at 20 degrees Celsius and a 60 Hz resistance of 0.0956 ohm per mile (or 0.0594 ohm per km) at 50 degrees Celsius for the all-aluminum Marigold conductor, which has 61 strands and whose size is 564 mm^2 or 1113 kcmil. Assuming an increase in resistance at 50 degrees Celsius, determine the percentage due to skin effect.
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