Physics Practice Test – Heat Energy and Measurement of Temperature (Questions with Answers and Explanations)

A faulty thermometer registers 102.5^oC at 100^oC. If the thermometer has no zero error, what will it register at 55.0^oC ?

A. 54.6^oC    B. 55.0 ^oC    C. 56.0 ^oC  D. 56.4 ^oC.

Which of the following statements about boiling and evaporation at atmospheric pressure is correct?  

A. Evaporation and boiling of water take place at 100°C
B. Evaporation of water takes place at a temperature greater than 100°C, while boiling takes place at 100°C
C. Evaporation of water takes place at 100°C while boiling takes place at a higher temperature.
D. Boiling takes place at 100°C while evaporation may take place at temperatures lower than 100°C.

It takes a shorter time for a liquid to boil at the top of a mountain than at the base because at the top, the ______

A. temperature is higher      B. pressure is lower     C. humidity is higher       D. temperature a constant.

The lower and upper fixed pouts of a thermometer are 30 mm and 180 mm respectively. Calculate the temperature in degrees Celsius when the thermometer reads 45 mm.

A. 10.0°C      B. 15.0°C      C. 20.0°C      D. 30.0°C

An immersion heater rated 400W, 220V is used to heat a liquid of mass 0.5kg. If the temperature of the liquid increases uniformly at the rate of 2.5°C per second, calculate the specific heat capacity of the liquid. [Assume no heat is lost]

A. 1100 Jkg^-1K^-1     B. 320Jkg^-1K^-1     C. 200 Jkg^-1k^-1     D. 176Jkg^-1K^-1