NEET Physics Resistance & Resistivity Assertion Reason Question
Assertion (A): The resistivity of a platinum wire increases with an increase in temperature.
Reason (R): The resistance of a platinum wire at the steam point is higher than at the ice point.
Both A and R are true and R is the correct explanation of A.
Both A and R are true but R is not the correct explanation of A.
A is true but R is false.
A is false but R is true.
Correct Answer
Detailed Explanation
The NCERT context mentions that the resistance of platinum increases from 5 W at the ice point to 5.23 W at the steam point, showing a temperature dependence of resistivity.
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