The diagram shows a trace of a wave on a cathode-ray oscilloscope.
The vertical and horizontal gridlines have a spacing of 1.0cm. The voltage scaling is 4Vcm-1 and
the time scaling is 5ms cm-1.
1cm
1cm
What are the amplitude and period of the wave?
amplitude/V period / ms
A 1.5 4
B 5.0 10
C 6.0 20
D 12.0 20
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