Waec Physics 1988 Past Questions and Answers

Question 21:

• WAEC 1988

The temperature at which the water vapour present in the air is just sufficient to saturate it is called the

A. Ice point
B. Boiling point
C. Steam point
D. Dew point
E. Saturation point

Question 22:

• WAEC 1988

Which of the following instrument may be used to measure the relative humidity?

A. Hydrometer
B. Barometer
C. Manometer
D. Hypsometer
E. Hygrometer

Question 23:

• WAEC 1988

Which of the following will affect the saturation vapour pressure of a liquid?

A. Temperature of the liquid
B. Humidity of air
C. Volume of vapour
D. Volume of the liquid
E. Mass of the liquid

Question 24:

• WAEC 1988

Which of the following statements is/are not correct about image formed by a plane mirror?
I. The magnification produced is 1
II. The image distance is same as the object distance
III. The image is real
IV. The image is laterally inverted

A. I only
B. II only
C. III only
D. I & II only
E. II & IV only

Question 25:

• WAEC 1988

A transparent rectangular block 5.0cm thick is placed on a black dot. The dot when viewed from above is seem 3.0cm from the top of the block calculate the refractive index of the material of the block.

A. 2/5
B. 3/5
C. 3/2
D. 5/3
E. 5/2