The temperature at copper will have the same resistivity as tungsten does at
Answer to Problem 18P
Explanation of Solution
Given info:
Reference temperature is
Resistivity of tungsten is
Resistivity of copper is
Formula used:
The resistivity of metal increases linearly with the temperature. Expression for this:
Where,
Calculation:
Formula for temperature-dependent resistivity,
Now, solve for
The new resistivity of copper is equal to that of tungsten at room temperature. So,
Copper’s resistivity is compared with its known value at room temperature. So,
Thus,
Now, substitute the given equation and the temperature coefficient
Conclusion: The required temperature is
Chapter 18 Solutions
Physics: Principles with Applications
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