At room temperature ( 2 7 ∘ C ) , the resistance of a heating element is 50Ω . The temperature coefficient of the material is 2.4 × 1 0 − 4 ∘ C − 1 . The temperature of the element, when its resistanc

Question

At room temperature ( 2 7 ∘ C ) , the resistance of a heating element is 50Ω . The temperature coefficient of the material is 2.4 × 1 0 − 4 ∘ C − 1 . The temperature of the element, when its resistance is 62Ω , is _____ ∘ C .

TestHub · Accepted Answer

​ R = R 0 ​ ( 1 + α Δ T ) 62 = 50 [ 1 + 2.4 × 1 0 − 4 Δ T ] Δ T = 100 0 ∘ C ⇒ T − 2 7 ∘ = 100 0 ∘ C T = 102 7 ∘ C ​

Physics - Heat & Thermo Question with Solution | TestHub

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