4. A copper wire has a length of 3500 ft and having an area of 144 cm squared. Find the resistance of the copperconductor at a temperature of 43ºC.5. The power taken by a resistive coil made of copper wire is 1200W at 120V and 15 °C. Calculate the powerconsumed by the coil when connected at 250V and 110°C. The temperature coefficient at 27 °C is 0.00393 °C-1.

Answered: 4. A copper wire has a length of 3500…

4. A copper wire has a length of 3500 ft and having an area of 144 cm squared. Find the resistance of the copper conductor at a temperature of 43ºC.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter19: Special-purpose Outlets-water Pump, Water Heater

Section19.2: Water Heater Branch Circuit

Problem 8R: For residential water heaters, the Consumer Product Safety Commission suggests a maximum temperature...

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Concept explainers

Photoelectric

The photoelectric effect occurs when light (or similar incident radiation, including X-rays) falls on material together with a metal plate and causes it to emit electrons. The discovery of the photoelectric effect led to important new theories (and to a Nobel Prize for Albert Einstein). Photoelectric cells, or photocells, are utilized in burglar-alarm light detectors and garage-door openers (each employs a through-beam of light this is broken when something movements throughout it), and also to play soundtracks on film movies (in which a light beam shines through the soundtrack encoded at the film and is "read" with the aid of the photocells).

Question

4. A copper wire has a length of 3500 ft and having an area of 144 cm squared. Find the resistance of the copper
conductor at a temperature of 43ºC.
5. The power taken by a resistive coil made of copper wire is 1200W at 120V and 15 °C. Calculate the power
consumed by the coil when connected at 250V and 110°C. The temperature coefficient at 27 °C is 0.00393 °C-1.

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