Questions
The resistance of a conductor is 5 ohm at 500C and 6 ohm at 1000C. Its resistance at 00C is
a
1 ohm
b
2 ohm
c
3 ohm
d
4 ohm
detailed solution
Correct option is D
R1R2=1+αt11+αt2⇒ 56 = 1+α×501+α×100⇒α=1200 per 0CAgain by Rt = R0 1+αt⇒ 5 = R0 1+1200 × 50 ⇒ R0 =4 ΩTalk to our academic expert!
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A piece of copper and the other of germanium are cooled from the room temperature to 80K, then which of the following would be correct statement?
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