4. Electricity and magnetism
A section of Physics, 5054
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A microphone is connected to a cathode-ray oscilloscope (c.r.o.). A note produced by a musical instrument causes a trace on the screen. The trace is stored electronically in the c.r.o. shows the stored trace displayed on the screen. timebase Y-gain Oscilloscopes CIE 1 division microphone The timebase setting on the oscilloscope is 0.20 ms / division. Determine the frequency of this note. frequency = A note from a second musical instrument is played and the trace S produced by the new note is also displayed on the screen. shows the screen displaying both the original trace and S. 1 division S In each of the three spaces below, describe either a similarity or a difference between the sounds made by the two notes. 1. 2. 3.
5054_w10_qp_22
THEORY
2010
Paper 2, Variant 2
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