0

Guest

Courses New

The resistance corresponding to the lower and the upper fixed points, in a platinum resistance thermometer are 3.50Ω and 3.65Ω what would be the resistance at a temperature equal to the freezing point of mercury(-37 °)? I hav tried this quest but im little bit confused

The resistance corresponding to the lower and the upper fixed points, in a platinum resistance thermometer are 3.50Ω and 3.65Ω what would be the resistance at a temperature equal to the freezing point of mercury(-37 °)? 


I hav tried this quest but im little bit confused

Grade:12

1 Answers

Vikas TU
14149 Points
10 years ago
Assuming the fixed points are for 0ºC and 100ºC, then ..

?R ≡ 100ºC 
1ºC = (?R / 100)Ω = {(3.65 - 3.50) / 100}Ω .. .. 1ºC ≡ 0.0015Ω

37º below Ro = (37 x 0.0015)Ω below Ro = R
R = Ro - (37 x 0.0015)Ω .. .. (Ro = resistance at 0º, 3.50Ω)

R = 3.50Ω - (37 x 0.0015)Ω .. .. ?R = 3.44Ω
  • PLZ  APPROVE!!!!!!!!!!!!!!1

Think You Can Provide A Better Answer ?

Other Related Questions on Thermal Physics

View all Questions »

ASK QUESTION

Get your questions answered by the expert for free

Answer and earn gift vouchers

Win Gift vouchers upto Rs 500/-

View courses by askIITians

Design classes One-on-One in your own way with Top IITians/Medical Professionals

Click Here Know More

Complete Self Study Package designed by Industry Leading Experts

Click Here Know More

Live 1-1 coding classes to unleash the Creator in your Child

Click Here Know More

a Complete All-in-One Study package Fully Loaded inside a Tablet!

Click Here Know More