Waec Physics 2006 Past Questions and Answers

Question 26:

• WAEC 2006

The temperature of a liquid falls after some of it has evaporated because

A. The liquid left is smaller in volume and the breeae easily cools it
B. The more energetic molecules have escaped into the atmosphere
C. The liquid left has less latent heat
D. After evaporation impurites are left behind

Question 27:

• WAEC 2006

The S.I units of frequency, period and amplitude of a wave are respectively

A. Hertz, second and centimeter
B. Second, metre and hertz
C. Metre, hertz and seconds
D. Hertz, second and metre

Question 28:

• WAEC 2006

a note of frequency 2000Hz has a velocity of 400 ms^-1. calculate the wavelength of the note

A. 5.0m
B. 2.0m
C. 0.5m
D. 0.2m

Question 29:

• WAEC 2006

The eclipse of the moon occurs when the

A. Moon comes exactly between the earth and the sun
B. Earth comes exactly between the moon and the sun
C. Sun comes exactly between the earth and the moon
D. Moon reflects all the rays from the sun onto the earth

Question 30:

• WAEC 2006

Which of the following observations cannot be explained using the rectilinear propagation of light?

A. Production of images by a pinhole camera
B. Production of real images of objects by lenses
C. Formation of an annular eclipse
D. Diffraction patterns of light