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ICSE Class 10 Answered

How is resistivity related to temperature?Explain.
Asked by viralprana | 02 May, 2023, 05:09: PM
answered-by-expert Expert Answer
Resistivity ρ has linear dependence on temperature T as given below.
 
begin mathsize 14px style rho space equals space rho subscript o left square bracket space 1 space plus space alpha space left parenthesis space T space minus space T subscript o right parenthesis space right square bracket end style
 
where ρo is resistivity at temperature at To = 20o C and α is temperature coefficient .
 
In most conducting metals, the resistivity increases with increasing temperature.
The increasing temperature causes increased vibrations of the atoms in the lattice structure of the metals,
which impede the motion of the electrons and increases the  resistivity.
Answered by Thiyagarajan K | 03 May, 2023, 12:50: AM

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