A coil of wire has a resistance of 38.0 Ω at 25° C and 43.7 Ω at 54° C. What is the temperature coefficient of resistivity?
let the temperature coefficient of resistivity is a
for R1 = 38 Ohm
R2 = 43.7 Ohm
delta T = 54 - 25 = 29 degree C
for the resistance
R2 = R1 *(1 + a * delta T)
43.7 = 38 * (1 + a * 29)
a = 0.00517 1/degree C = 5.17 *10^-3 1/degree C
the temperature coefficient of resistivity is 5.17 *10-3 1/degree C
A coil of wire has a resistance of 38.0 Ω at 25° C and 43.7 Ω at 54° C. What is the temperature coefficient of resistivi...
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