Assume that the temperature coefficients of resistivity given in Table 17.1 in t
ID: 1270069 • Letter: A
Question
Assume that the temperature coefficients of resistivity given in Table 17.1 in the textbook apply over large temperature ranges.
A).
What is the percentage variation of the resistivity of copper over the temperature range from room temperature (20 ?C) to 120??
Express your answer as an integer.
(P-Po)/Po =
B).
Assume that a copper wire's resistance changes due to only resistivity changes over this temperature range. Further assume that it is connected to the same power supply. By what percentage would its current change?
Express your answer as an integer.
(Io-I)/Io =
C). Would it be an increase or decrease?
I JUST WANT THE RIGHT ANSWER. THANKS :)
Explanation / Answer
a. 41%
b. ?
c. decrease