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The resistivity (specific resistance) of a copperwire [2002]
- a)increases with increase in its temperature
- b)decreases with increase in its cross-section
- c)increases with increase in its length
- d)increases with increase in its cross-section
Correct answer is option 'A'. Can you explain this answer?
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Verified Answer
The resistivity (specific resistance) of a copperwire [2002]a)increase...
Resistivity of copper wire increases with
increase in temprature as ρt = ρ0 (1+ αt)
Copper being a metal has positive coefficient
of resistivity.
increase in temprature as ρt = ρ0 (1+ αt)
Copper being a metal has positive coefficient
of resistivity.
Most Upvoted Answer
The resistivity (specific resistance) of a copperwire [2002]a)increase...
Explanation:
Temperature Effect:
- The resistivity of a material like copper increases with an increase in temperature.
- This is due to the fact that as the temperature rises, the atoms in the material vibrate more vigorously, causing more collisions with the free electrons, which increases resistance.
Cross-Sectional Area Effect:
- The resistivity of a copper wire decreases with an increase in its cross-sectional area.
- This is because a larger cross-sectional area provides more pathways for the flow of electrons, reducing resistance.
Length Effect:
- The resistivity of a copper wire increases with an increase in its length.
- This is because a longer wire offers more resistance to the flow of electrons compared to a shorter wire.
Therefore, the correct answer is option 'A' which states that the resistivity of a copper wire increases with an increase in its temperature.
Temperature Effect:
- The resistivity of a material like copper increases with an increase in temperature.
- This is due to the fact that as the temperature rises, the atoms in the material vibrate more vigorously, causing more collisions with the free electrons, which increases resistance.
Cross-Sectional Area Effect:
- The resistivity of a copper wire decreases with an increase in its cross-sectional area.
- This is because a larger cross-sectional area provides more pathways for the flow of electrons, reducing resistance.
Length Effect:
- The resistivity of a copper wire increases with an increase in its length.
- This is because a longer wire offers more resistance to the flow of electrons compared to a shorter wire.
Therefore, the correct answer is option 'A' which states that the resistivity of a copper wire increases with an increase in its temperature.
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The resistivity (specific resistance) of a copperwire [2002]a)increases with increase in its temperatureb)decreases with increase in its cross-sectionc)increases with increase in its lengthd)increases with increase in its cross-sectionCorrect answer is option 'A'. Can you explain this answer?
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