The temperature coefficient of resistance of a wire is 0.00125 per degree centigrade.at 300k its resistance is 1 ohm.the resistance of the wire will be 2 ohm at?
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Use this general equation: R = R₀[1 + αΔT]
R = R₀[1 + αΔT]
2 = 1 × [1 + 0.00125 × (T - 300)]
1/0.00125 = T - 300
T = 300 + 1/0.00125
T = 300 + 800
T = 1100 K
∴ Resistance is 2 Ω at 1100 Kelvin
R = R₀[1 + αΔT]
2 = 1 × [1 + 0.00125 × (T - 300)]
1/0.00125 = T - 300
T = 300 + 1/0.00125
T = 300 + 800
T = 1100 K
∴ Resistance is 2 Ω at 1100 Kelvin
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