Question

 If the resistance of a coil is 2Ω at 0°C and α=0.004/°C then its resistance at 100°C is

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Answer 1

Answer:

resistance at 100°C = 2.8 Ω

Answer 2

4.2 = Ro( 1+ 0.004(100-0)

4.2 = Ro×1.4

Ro= 4.2/ 1.4 = 3

answer is = 3 ohm