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7.1. Progressive waves
A subsection of Physics, 9702, through 7. Waves
Listing 10 of 202 questions
A source of sound has frequency f. Sound of wavelength λ is produced by the source. State 1. what is meant by the frequency of the source, 2. the distance moved, in terms of λ, by a wavefront during n oscillations of the source. distance = Use your answers in to deduce an expression for the speed v of the wave in terms of f and λ. The waveform of a sound wave produced on the screen of a cathode-ray oscilloscope (c.r.o.) is shown in . 1 cm 1 cm The time-base setting of the c.r.o. is 2.0 ms cm–1. Determine the frequency of the sound wave. frequency = Hz A second sound wave has the same frequency as that calculated in . The amplitude of the two waves is the same but the phase difference between them is 90°. On , draw the waveform of this second wave.
9702_s10_qp_23
THEORY
2010
Paper 2, Variant 3
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The diagram shows a cathode-ray oscilloscope (c.r.o.) being used to measure the rate of rotation of a flywheel. 10 cm coil flywheel M The flywheel has a small magnet M mounted on it. Each time the magnet passes the coil, a voltage pulse is generated, which is passed to the c.r.o. The display of the c.r.o. is 10 cm wide. The flywheel is rotating at 3000 revolutions per minute. Which time-base setting will display clearly separate pulses on the screen?
9702_s16_qp_12
MCQ
2016
Paper 1, Variant 2
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Questions Discovered
202