The power dissipated in the wire.
Answer to Problem 82GP
Explanation of Solution
Given info:
A length of wire is double.
Formula used:
It is known that resistance:
Where,
Calculation:
By using the given formula,
Now, solve for
Therefore,
So,
According to the question, the wire is stretched uniformly which means that the value of the volume of the wire will not change. So, by using the formula of volume:
Where,
Since the volume will not change, then
Therefore,
Expression for electrical power is
Where,
So,
Therefore,
Substitute the value
So,
Conclusion: The power decreases by a factor of
Chapter 18 Solutions
Physics: Principles with Applications
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