Waec Physics 2003 Past Questions and Answers

Question 11:

• WAEC 2003

A platinum resistance thermometer has a resistance 4\(\Omega\) at 0^oC and 100\(\Omega\) at 100^oC. Assuming the resistance changes uniformly with temperature. Calculate the resistance of the thermometer when the temperature is 45^oC

A. 14.0\(\Omega\)
B. 6.7\(\Omega\)
C. 3.2\(\Omega\)
D. 2.7\(\Omega\)

Question 12:

• WAEC 2003

a metal rod of length 100cm is heated through 100^oC, calculate the change in length of the rod [linear expansivity of the material of the rod is 3 x 10^-6K^-1]

A. 4mm
B. 3mm
C. 2mm
D. 1mm

Question 13:

• WAEC 2003

The heat capacity of a calorimeter is the amount of energy required to

A. Change the temperature of 1kg of the calorimeter by 1k
B. Change 1kg mass of the calorimeter to liquid at the same temperature
C. Change the temperature of the calorimeter
D. Melt the calorimeter into liquid at a constant temperature

Question 14:

• WAEC 2003

Which of the following statement about latent heat of vaporization is correct? It

A. Weakens the adhesive force between molecules of a liquid and those of its container
B. Breaks completely the force of attraction completely between the molecules of a liquid
C. Add to the heat content of a liquid
D. Increases the cohesive forces between liquid molecules

Question 15:

• WAEC 2003

When the pressure of a fixed mass of gas is doubled at constant temperature, the volume of the gas is

A. Increased four times
B. Doubled
C. Unchangeable
D. Halved