Assertion (A): For a conductor resistivity increases with increase in temperature. Reason (R): S...
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1Assertion (A): For a conductor resistivity increases with increase in temperature.
Reason (R): Since \( \rho=\frac{m}{n e^{2} \tau} \) when temperature increases the random motion of free electrons increases and vibration of ions increases which decreases \( \tau \).
(A) Both A and R are true and R is the correct explanation of A.br(B) Both A and R are true, but R is not the correct explanation of A.
(C) A is true, but R is false.
(D) A is false, but R is true.
(E) Both A and R are false.
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