Physics Current, Resistance and Electricity Resistance and Resistivity

The resistance of platinum wire at 0°C is 2 Ω and 6.8 Ω at 80°C. The temperature coefficient of resistance of the wire is:

1
3 × 10-4 °C-1
2
3 × 10-3 °C-1
3
3 × 10-2 °C-1
4
3 × 10-1 °C-1
5
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