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If the resistance of a conductor is $5 Ω$ at 50⁰C, and $7 Ω$ at 100⁰C, then the mean temperature coefficient of resistance of the material is

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0.008/0C

0.006/0C

0.004/0C

0.001/0C

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detailed solution

Correct option is A

Using RT2 =RT1 1+ αT2−T2⇒R100 =R50 1+α 100−50⇒ 7=5 1+α ×50 ⇒α = 7−5250 = 0.008/0C

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If the resistance of a conductor is 5Ω at 500C, and 7Ω at 1000C, then the mean temperature coefficient of resistance of the material is

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If the resistance of a conductor is $5 Ω$ at 50⁰C, and $7 Ω$ at 100⁰C, then the mean temperature coefficient of resistance of the material is