Physics WAEC Past Questions

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1196

An object is placed 20.0cm in front of a converging lens of focal length 15.0cm. Calculate its image distance

A. 1.3cm
B. 8.6cm
C. 35.0cm
D. 60.0cm

View Answer & Discuss (4) WAEC 2011

1197

Presbyopia is a defect of the eye resulting from

A. weak ciliary muscles
B. short eyeball
C. loss of sphericity of the lens
D. long eyeball

View Answer & Discuss (1) WAEC 2011

1198

The focal length of the eye-piece of an astronomical telescope is f₁, while the focal length of the object is f₂. Fro normal adjustment, the angular magnification is given by

A. \(\frac{f_2}{f_1}\)
B. 1 - \(\frac{f_2}{f_1}\)
C. \(\frac{f_2}{f_1}\) - 1
D. \(\frac{f_1}{f_2}\)

View Answer & Discuss (4) WAEC 2011

1199

two sound waves have frequencies of 12Hz and 10Hz. Calculate their beats period

A. 0.5s
B. 1.0s
C. 1.2s
D. 2.0s

View Answer & Discuss (3) WAEC 2011

1200

The main difference between echo and reverberation is that

A. reverberation is reflected sound while echo is refracted sound
B. the time interval between incident sound and reflecte sound is shorter for reverbration
C. the amplitude of an echo is greater
D. reverberation is from acoustic speakers while echo comes from clifts

View Answer & Discuss WAEC 2011

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