Properties Of Solids And Liquids Question 504
Question: The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at 10°C and 100°C. The temperature at which the resistance is 3.26 ohm is [CPMT 1994]
Options:
A) 40°C
B) 50°C
C) 60°C
D) 70°C
Show Answer
Answer:
Correct Answer: B
Solution:
Change in resistance $ 3.70-2.71=0.99\Omega $
corresponds to interval of temperature 90°C.
So change in resistance $ 3.26-2.71=0.55\Omega $
Corresponds to change in temperature $ =\frac{90}{0.99}\times 0.55=50{}^\circ C $
