In: Physics
un resistor construido de la aleacion de nicromo (niquel-cromo) tiene una resistencia de 20 a 30 grados celsius. detemrine la resistencia cuandoel resistor esta operando a 150 grados celius.
A.20.5
B. 20.3
c.21.5
D.20.8
E.22
F.21
Answer:
I can translate the question from Spanish to English.
A resistor constructed from the Nichrome (Nickel-Chromium) alloy has a resistance of 20 at 30 0C. Determine the resistance when the resistor is operating at 150 0C
Given, that R0 = 20 and T1 = 30 0C and T2 = 150 0C
Using the expression for the temperature dependence of resistance.
R = R0 [1 + T], where is temperature coefficient of resistance. For Nichrome, = 0.0004 (0C)-1
Thus, R = (20 ) [1 + 0.0004 (0C)-1 (150 0C - 30 0C)]
R = (20 ) [1 + 0.04]
Therefore, R = (20 ) (1.04) = 20.8
Hence, option (D) is correct.
In Spanish,
Por lo tanto, la opción (D) es correcta.