Question

For metals such as copper, what is the effect of increasing temperature and the sign of \(\alpha\)?

विकल्प

• Resistivity changes only slightly; \(\alpha\) is zero

• Resistivity remains constant; \(\alpha\) is negative

• Resistivity increases; \(\alpha\) is positive

• Resistivity decreases; \(\alpha\) is negative

Answer 1

For metals such as copper, increasing temperature increases resistivity. The sign of \(\alpha\) for metals is positive.