A coil of wire has a resistance of 33.8Ω at 28 °C and 44.6Ω at 69...

Question

Question

A coil of wire has a resistance of 33.8Ω at 28 °C and 44.6Ω at 69 °C. What is the temperature coefficient of resistivity?

Answer 1

Answer #1

The relation between resistance and coefficient of resistivity is given as

R = R_o (1 + (T - T_o))

R / R_o = 1 + (T - T_o)

just solve for , we get

= R / R_o - 1 / T - T_o

= 44.6/33.8 - 1 / 69 - 28

= 7.793e-3 / ^oC

Answer 2

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