Waec Physics 1991 Past Questions and Answers

Question 31:

• WAEC 1991

what part of the camera corresponds to the iris of the eye?

A. Shutter
B. Film
C. Lens
D. Diaphram
E. Focusing ring

Question 32:

• WAEC 1991

Which of the following is not a mechanical wave?

A. Wave propagatd in stretched string
B. Wave in closed pipe
C. Radio waves
D. Water waves
E. Sound waves

Question 33:

• WAEC 1991

Which of the following remains unchanged as light travels from one medium to the other? i. speed. ii. wavelength. iii. frequency.

A. I only
B. Ii only
C. Iii only
D. I and ii only
E. I and ii only

Question 34:

• WAEC 1991

Which of the following statements about wave is not correct? i. A wavefront is a line which contains all particles whose vibration are in phase. ii. The direction of propagation of a wave is the link drawn parallel to the wavefront. iii. A wavefront is a circle which is common to particles that are in the same state of disturbance

A. I only
B. Ii only
C. I and ii only
D. I and iii only
E. Ii and iii only

Question 35:

• WAEC 1991

What type of motion does the skin of a talking drum perform when its being struck with the drum stick?

A. Random
B. Rational
C. Vibratory
D. Translational
E. Circular