Concept explainers
The resistance of each piece.
Answer to Problem 16P
Explanation of Solution
Given info:
Resistance of a copper wire
The resistance of one piece is
Formula used:
It is known that resistance:
Where,
Calculation:
Formula of resistivity,
By using the condition that resistance of one wire is four times the resistance of the other wire:
It is known that the cross-sectional area and resistivity remains the same. The resistance of the length will be changed. If one wire has four times the resistance of the other, it must be four times as long. The shorter wire must be exactly
It is known that the resistance is depended only on the length, the resistances are
Conclusion:
The wire must be cut at a point
Chapter 18 Solutions
Physics: Principles with Applications
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