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GUJCET · Physics · Current Electricity
When the temperature of a conductor increases the ratio of conductivity and resistivity __________.
- A decrease
- B increase
- C remain constant
- D increase or decrease
Answer & Solution
Correct Answer
(A) decrease
Step-by-step Solution
Detailed explanation
A
\(\frac{\text { conductivity }}{\text { resistivity }}=\frac{\sigma}{\rho}=\frac{1}{\rho^2}\)
resistivity increases when temperature is increased.
Thus, the given ratio decreases.
\(\frac{\text { conductivity }}{\text { resistivity }}=\frac{\sigma}{\rho}=\frac{1}{\rho^2}\)
resistivity increases when temperature is increased.
Thus, the given ratio decreases.
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