A conductor has resistance 4 Ω at 0°C and temperature coefficient α. At what temperature will resistance be 6 Ω? (α=0.004 /°C) MCQ with Answer and Explanation

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A conductor has resistance 4 Ω at 0°C and temperature coefficient α. At what temperature will resistance be 6 Ω? (α=0.004 /°C)

A. 125°C

B. 150°C

C. 100°C

D. 75°C

Answer: Option A

Solution (By JKExamLibrary)

R_t = R₀(1+α t). 6 = 4(1+0.004 t) => 1.5 = 1+0.004t => 0.5=0.004t => t=125°C.

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