NDA 2025
- Exam
- NDA
- Year
- 2025
- Subject
- General Ability
- Chapter
- General Science
NDA 2025 · General Ability · General Science
If the length of a copper wire is increased by twice, then its...
If the length of a copper wire is increased by twice, then its resistivity will be
Options
- ADoubled
- BHalved
- CSame
- DOne-fourth
Correct answer
C. Same
Step-by-step solution
Resistivity is an intrinsic property of a material.
It depends only on the nature of the material and its temperature.
It is independent of the physical dimensions such as length and area of cross-section of the wire.
Therefore, when the length of the copper wire is increased, its resistivity remains the same.
Answer: Same
It depends only on the nature of the material and its temperature.
It is independent of the physical dimensions such as length and area of cross-section of the wire.
Therefore, when the length of the copper wire is increased, its resistivity remains the same.
Answer: Same