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Question
A metallic conductor has a resistivity of 2.63 × 10−8 Ωm at 20°C. If the temperature of the conductor is raised to 200°C, its resistivity will:
Options
increase
decrease
remain unaffected
none of these
MCQ
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Solution
Increase
Explanation:
In metals, higher temperatures increase lattice vibrations, so resistivity increases. Therefore, resistivity increases as temperature rises from 20°C to 200°C, rather than decreasing or remaining unaffected.
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