When the temperature of a conductor increases the ratio of conductivity and resistivity ___________.
A
Remain constant
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B
Increase
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C
Decrease
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D
Increase or decrease
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Solution
The correct option is C Decrease Resistance of the conductor increases with increase in temperature whereas conductance of the conductor decreases with increase in the temperature. Thus ratio of conductivity and resistivity decreases with increase in temperature. Correct answer is option C.