NEET 2002 Physics question

Specific resistance of a conductor increases with :

(1)Increase in temperatureCorrect
(2)Increase in cross section area
(3)Increase in cross section and decrease in length
(4)Decrease in cross section area

Answer: (1)

Solution

Specific resistance (resistivity) is a property of the material only: it does not depend on the geometry (length or cross-section area). For a metallic conductor it increases with temperature because the

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Question ID VK-088971