Question

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

Options

• Resistivity becomes zero; \(\alpha\) is zero

• Resistivity changes only slightly; \(\alpha\) has a small positive value

• Resistivity increases greatly; \(\alpha\) has a large negative value

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

Answer 1

Alloys such as nichrome have resistivity that changes only slightly with increasing temperature. Their temperature coefficient has a small positive value.