Waec Physics 2002 Past Questions and Answers

Question 31:

• WAEC 2002

In a compound microscope, the image formed by the objective lens is at a distance of 3.0cm from the eye lens. Calculate the focal length of the eye lens

A. 0.3cm
B. 2.7cm
C. 3.4cm
D. 8.3cm

Question 32:

• WAEC 2002

A pulse of a sound is transmitted from a ship and the reflection from the sea bed is recorded after 0.2s. Calculate the depth of the sea. [Take speed of sound in sea water = 1560ms^-1]

A. 312.0m
B. 156.0m
C. 78.0m
D. 31.2m

Question 33:

• WAEC 2002

When two notes of nearly equal frequencies are sounded together, a periodic rise and fall in sound intensity can be heard. This phenomenon can be called

A. Beats
B. Diffraction
C. Overtones
D. Resonance

Question 34:

• WAEC 2002

Which of the following instruments is not a wind instrument?

A. Clarinet
B. Saxophone
C. Trumpet
D. Xylophone

Question 35:

• WAEC 2002

Which of the following actions will not cause an increase in the frequency of a vibrating string?

A. Increasing the tension of the string
B. Decrease the mass per unit lengthof the string
C. Decrease the length of the string
D. Increasing the cross sectional area of the string