WAEC Physics Past Questions, Answers, And Explanations - Physics

Waec Physics Questions

Question 736:

WAEC 2000

A periodic pulse travels a distance of 20.0m in 1.00s. If its frequency is 2.0 x 10³Hz. Calculate the wavelength.

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A 1.0 x 10^-3m
B 1.0 x 10^-2m
C 2.0 x 10^-2m
D 1.0 x 10²m

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Question 737:

WAEC 2000

A wave has an amplitude equal to 4.0m, angular speed \(\frac{1}{3} \pi\) rads^-1 and phase angle \(\frac{2}{3} \pi\) rad. The displacement y of the wave particle is given as

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A Y = 4 sin \(\frac{\pi}{3}\)(t + 2)
B Y = 4 sin \(\frac{\pi}{3}\)(t + \(\frac{2}{\pi}\)
C Y = 4 sin \(\frac{\pi}{3} (2t + 1)\)
D Y = 4 sin \(\frac{\pi}{3} (t + 2)

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Question 738:

WAEC 2000

In the diagram above, an incident ray AY makes an angle of 30^o with the normal XY. If the mirror is rotated anticlockwise about Y through an angle of 20^o, while AY is fixed, what angle will the reflected ray now make with the incident ray?

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