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According to Joule’s law, if the potential difference across a conductor of resistivity r remains constant, then the heat produced in the conductor is proportional to
  • a)
    1 / ρ
  • b)
    None of these
  • c)
    ρ2
  • d)
    ρ
Correct answer is option 'A'. Can you explain this answer?
Verified Answer
According to Joule’s law, if the potential difference across a conduc...
We know, P = V2 / R
but,
R = ρL / A ​
P = ​ V2 / ρL / A​
P = AV2 / ρL ​
P ∝ 1 / ρ ........(since AV2 / L ​= constant)
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According to Joule’s law, if the potential difference across a conductor of resistivity r remains constant, then the heat produced in the conductor is proportional toa)1 / ρb)None of thesec)ρ2d)ρCorrect answer is option 'A'. Can you explain this answer?
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