Current Electricity Charging Discharging Of Capacitors Question 397
Question: At what temperature will the resistance of a copper wire become three times its value at 0oC (Temperature coefficient of resistance for copper = 4 × 10?3 per oC )
[MP PET 2000]
Options:
A) $ 400^{o}C $
B) $ 450^{o}C $
C) $ 500^{o}C $
D) $ 550^{o}C $
Show Answer
Answer:
Correct Answer: C
Solution:
By using $ R _{t}=R _{0}(1+\alpha t) $
$ 3\times R _{0}=R _{0}(1+4\times {{10}^{-3}}t) $
$ \Rightarrow t=500^{o}C $ .
BETA
