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Physics-Resistance & Resistivity

NEET Physics Resistance & Resistivity MCQ Question

Type: MCQ-numerical-Medium-Class 12

The resistance of a platinum resistance thermometer at the ice point is 5 Ω and at the steam point is 5.23 Ω. If the resistance of the platinum wire is measured to be 5.5 Ω, what is the temperature of the medium in which the thermometer is placed?

A

43.48 °C

B

50.00 °C

C

65.22 °C

D

75.00 °C

Correct Answer

Option A

Detailed Explanation

Using the formula Rt=R0+R100−R0100×tR_t = R_0 + \frac{R_{100} - R_0}{100} \times t, we find t=(5.5−5)(5.23−5)×100≈43.48t = \frac{(5.5 - 5)}{(5.23 - 5)} \times 100 \approx 43.48 °C.

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