2001 - WAEC Physics Past Questions and Answers - page 3
Humidity is used to describe the amount of
Surface waves travelling in deep water at 15ms-1 are incident at a shallow water boundary. If the angles of incidence and refraction are 45o and 30o respectively. Calculate the speed of the waves in shallow water
An incident ray is reflected normally by a plane mirror onto a screen where it forms a bright spot. The mirror and screen are parallel and 1m apart. If the mirror is rotated through 5o, calculate the displacement of the spot
Convex spherical mirrors are preferred to plane mirrors as driving mirrors because
An object is placed 20cm from a lens. If an image is formed on a screen 260cm away from the lens, calculate the magnification of the image
A piece of cloth appears green in sunlight. When held in red light, it will appear
Dispersion of white light by a glass prism occurs because
Which of the following statements about sound is correct?
The diagram above shows the wire of a sonometer box set into resonance by a vibrating tuning fork of frequency f, when the wire is stretched by a tension T, the resonating length of the wire is I while the wavelength of the sound produced is (\lambda). Which of the following statements is not correct? The wave produced on the wire is
The diagram above shows the wire of a sonometer box set into resonance by a vibrating tuning fork of frequency f, when the wire is stretched by a tension T, the resonating length of the wire is I while the wavelength of the sound produced is (\lambda). Which of the following statements about the frequency of vibration of the wire is not correct?