Waec Physics 2001 Past Questions and Answers

Question 21:

• WAEC 2001

Which of the following physical qualities affects the saturated vapour pressure of a liquid ?

A. Temperature
B. Volume
C. Mass
D. Density

Question 22:

• WAEC 2001

Humidity is used to describe the amount of

A. Air in water vapour
B. Cloud available in the atmosphere
C. Air in equal volume of cloud
D. Water vapour in the amosphere

Question 23:

• WAEC 2001

Surface waves travelling in deep water at 15ms^-1 are incident at a shallow water boundary. If the angles of incidence and refraction are 45^o and 30^o respectively. Calculate the speed of the waves in shallow water

A. 8.1ms^-1
B. 10.0ms^-1
C. 10.6ms^-1
D. 22.5ms^-1

Question 24:

• WAEC 2001

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 5^o, calculate the displacement of the spot

A. 8.7cm
B. 10.0cm
C. 15.4cm
D. 17.6cm

Question 25:

• WAEC 2001

Convex spherical mirrors are preferred to plane mirrors as driving mirrors because

A. The image produce is upright and clearly visible
B. It provides a wider field of view
C. The image produce is errect and diminished
D. The image produced is not laterally inverted