The resistance of a resistance thermometer has values 2.71 and 3.70 ohm at 10oC and 100oC. The temperature at which the resistance is 3.26 ohm is:


Correct option is



Change in resistance 3.70 – 2.71 = 0.99  corresponds to interval of temperature 90oC.

So change in resistance 3.26 – 2.71 = 0.55  corresponds to change in temperature




Two rods of same material and length have their radii in ratio of 3:1, the ratio of expansion  when same amount of heat is supplied will be:


A piece of platinum can be sealed successfully into soda glass but not a piece of copper because:


Liquid is filled in a flask up to a certain point. When the flask is heated, the level of liquid:


Coefficients of volume expansion of substances are generally in the range of:


The metal of a pendulum clock has a coefficient of expansion as K. Its period is 2 s at 15oC. If the temperature increases to 25oC, shall the clock:


A metal ball immersed in alcohol weighs W1 at 00C and W2 at 59oC. The coefficient of cubical expansion of the metal is less than that of alcohol. Assuming that the density of metal is large compared to that of alcohol, it can be show that:


Two straight metallic strips each of thickness t and length L are rivetted together. Their coefficients of linear expansions are   If they are heated through temperature , the bimetallic strip will bend to form an arc of radius:


A pendulum clock is 5 sec fast at temperature of 15oC and 10 seconds slow at a temperature of 30oC. At what temperature does it give the correct time?


A thermometer is graduated in millimeters. It registers – 3 mm when the bulb of thermometer is in pure melting ice and 22 mm when the thermometer is in steam at a pressure of 1 atmosphere. The temperature in oC when the thermometer registers 13 mm is:


The standard fixed point for temperature measurements in use today is: