Question

What is the effect of temperature on the resistance of a conductor?

Answer 1

1. For pure metals, the resistance changes in proportionality with the temperature. With the increase in temperature, the resistance increases, and with the decrease in temperature, the resistance also decreases.
2. The effect of temperature on alloys is very weak. With a rise in temperature, the resistance of alloys changes very slightly.
3. The change in temperature does not affect the resistance of some alloys like manganin, constantan, and nichrome.
4. For a carbon filament bulb, the resistance decreases with an increase in temperature.
5. On increasing the temperature from $0^{o}C$ to ${24}^{o}C$, the resistance of vulcanized rubber decreases by $25\%$.