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Physics Past Questions and Answers

Waec Physics Questions

Question 1106:

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

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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

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Question 1107:

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

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

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Question 1108:

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

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

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Question 1109:

The eclipse of the moon occurs when the

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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

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Question 1110:

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

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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

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