Physical Science Multiple Choice Quiz Worksheet Page 8
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27. Which of the listed waves is longitudinal?
A
light waves
B
radio waves
C
sound waves
D
ultraviolet waves
[1]
28. The table shows the frequencies of two tuning forks being hit equally hard.
tuning fork
frequency/
Hz
C1
256
C2
512
Which statement gives a correct comparison of the sounds produced?
A
C1 is of higher pitch than C2.
B
C1 is of lower pitch than C2.
C
C1 is louder than C2.
D
C1 is softer than C2.
[1]
29. Which type of electromagnetic radiation causes sunburn to the skin?
A
long waves
B
microwaves
C
radio waves
D
ultraviolet
[1]
30. Optical fi bres are used in telecommunication because light can be
A
externally refl ected.
B
internally refl ected.
C
externally refracted.
D
internally refracted.
[1]
Section A : [30]
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