(A): The resistivity of metals increases with increase in temperature (R): The average time of collision of electrons with the ion of lattice decreases with increase in temperature.

(A): The resistivity of metals increases with increase in temperature

1.	(A): The resistivity of metals increases with increase in temperature (R): The average time of collision of electrons with the ion of lattice decreases with increase in temperature.
Answer» Both 'A' and 'R' are true and 'R' is the correct EXPLANATION of 'A' Both 'A' and 'R' are true and 'R' is not the correct explanation of 'A' 'A' is true and 'R' is FALSE 'A' is false and 'R' is false ANSWER :A

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(A): The resistivity of metals increases with increase in temperature (R): The average time of collision of electrons with the ion of lattice decreases with increase in temperature.

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