JAMB - Physics (1998 - No. 16)
A platinum resistance thermometer records 3.0\(\Omega\) at 0oC and 8.0\(\Omega\) at 100oC. If it records 6.0\(\Omega\) in a certain environment, The temperature of the medium is
80oC
60oC
50oC
30oC
Explicació
8\(\Omega\).....100oC
6\(\Omega\).....\(\theta\)oC
3\(\Omega\).....0oC
\(\frac{6 - 3}{8 - 3}\) = \(\frac{\theta - 0}{100 - 0}\)
therefore, \(\theta\) = 60oC
6\(\Omega\).....\(\theta\)oC
3\(\Omega\).....0oC
\(\frac{6 - 3}{8 - 3}\) = \(\frac{\theta - 0}{100 - 0}\)
therefore, \(\theta\) = 60oC