Concept explainers
The cost of the energy lost to heat per hour per meter.
Answer to Problem 61GP
The answer is
Explanation of Solution
Given info:
Resistivity of copper,
Current,
diameter,
Length,
Formula used:
By the definition of the power,
Where,
By the ohm’s law, a new expression for electrical power will be
Where,
It is known that resistance:
Where,
To calculate the cost of the energy, multiply the kilowatts of power consumed by the number of hours in operation times the cost per
Calculation:
By using the formula of power and resistance;
Now, calculate the cost of the energy,
Cost
Cost
Conclusion: The cost of the energy lost to heat per hour per meter:
Chapter 18 Solutions
Physics: Principles with Applications
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