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 $



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