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प्रश्न
The resistivity of copper metal depends on only one of the following factors. This factor is:
विकल्प
length
thickness
temperature
area of cross-section
MCQ
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उत्तर
Temperature
Explanation:
Resistivity is an intrinsic property of a material that depends only on the nature of the substance and its temperature. It does not change with physical dimensions like length, thickness, or cross-sectional area. For metals like copper, rising temperatures increase atomic vibrations, causing more electron collisions and higher resistivity.
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