Physics 2018 Waec Past Questions and Answers

Question 21 :

• WAEC 2018

Which of the following electromagnetic waves is most energetic?

A. Radio waves
B. X-ray
C. Gamma rays
D. Ultra-violet rays

Question 22 :

• WAEC 2018

Rainbow formation is a natural phenomenon illustrating that white light

A. Splits into three components after rainfall
B. Is dispersed by glass prisms
C. Splits into its constituent colours before rainfall
D. Is dispersed into its constituent colours after rainfall

Question 23 :

• WAEC 2018

The lens illustrated above can best be described as a

A. Converging meniscus
B. Plano-convex
C. Diverging meniscus
D. Bi-convex

Question 24 :

• WAEC 2018

Two plane mirrors are inclined to each other such that an object placed between them has 11 images. Determine the angle of inclination

A. 30°
B. 45°
C. 60°
D. 90°

Question 25 :

• WAEC 2018

The pitch of a note is not affected by

A. Frequency
B. Tension in a vibrating string
C. Mass of a vibrating string
D. Amplitude of sound wave