Waec Physics 1997 Past Questions and Answers

Question 11:

• WAEC 1997

Which of the following explains why a thick glass cup cracks when boiling water is poured into it?

A. Unequal expansion of the exterior and interior walls of the cup
B. Anomalous expansion of the water
C. Greater specific latent capacity of water compared with that of glass
D. Large increase in the heat capacity of the cup
E. High density of the water

Question 12:

• WAEC 1997

When white light is incident on a glass prism the spectrum produced on a screen placed beyond the prism is due to?

A. Diffraction
B. Reflection
C. Refraction
D. Polarisation
E. Interference

Question 13:

• WAEC 1997

At what distance from a simple microscope must an object be placed so that the image 5 times the size of the object is produced 20cm from the lens?

A. 2cm
B. 3.3cm
C. 4cm
D. 5cm
E. 15cm

Question 14:

• WAEC 1997

Whenever light waves are restricted to a specific plane they are said to be

A. Diffracted
B. Refracted
C. Diffused
D. Regularly reflected
E. Plane polarized

Question 15:

• WAEC 1997

A solid material of volume 100\(cm^{-3}\) is heated through a temperature difference of 40°C. Calculate the increase in the volume of the material if its linear expansitivity is 2 x \(10^{-6}K{-1}\)

A. 2.4 x\(10^{-2}cm^{-3}\)
B. 1.6 x\(10^{-2}cm^{-3}\)
C. 8 x\(10^{-2}cm^{-3}\)
D. 5 x\(10^{-2}cm^{-3}\)
E. 4 x\(10^{-2}cm^{-3}\)