The resistances of platinum wire at the ice and steam poi...
The resistances of platinum wire at the ice and steam points are 0.75 ohm and 1.05 ohm respectively. Determine the temperature at which the resistance of the wire is 0.90 ohm
43.0oC
50.0oC
69.9oC
87.0oC
Correct answer is B
100oC .... 1.05\(\theta\)
\(\theta\)oC .... 0.9\(\theta\)
0oC .... 0.75\(\theta\)
\(\frac{\theta - 0}{100 - 0}\) = \(\frac{0.9 - 0.75}{1.05 - 0.75}\)
\(\theta\) = 50oC
Which statement is a correct consequence of the uncertainly principle? ...
Lenz’s law of electromagnetic induction is essentially a statement of the ...
A metal of volume 40 cm3 is heated from 30 °c to 90 °c, the increase in volume is ...
If the efficiency of a transformer is 100%, which of the following equations would be correct? ...
What is the effect of using split-rings in a simple d.c motor? ...
Which of the following physical processes cannot be explained by the molecular theory of matter? ...