The ratio of the resistance of conductor at temperature 15 ° C to its resistance at temperature 37.5 ° C is 4 : 5 . The temperature coefficient of resistance of the conductor is -

Question

The ratio of the resistance of conductor at temperature 15 ° C to its resistance at temperature 37.5 ° C is 4 : 5 . The temperature coefficient of resistance of the conductor is -, l 25 ° C – 1, l 50 ° C – 1, l 80 ° C – 1, l 75 ° C – 1

MARKS App · Accepted Answer

R T = R 0 1 + α T R 15 R 37.5 = R 0 1 + α × 15 R 0 1 + α × 37.5 ∴ 4 5 = 1 + α × 15 1 + α × 37.5

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