16372434
Descripción
Test por Jeffrey Piggott, actualizado hace más de 1 año
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Creado por Jeffrey Piggott
hace más de 5 años
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Pregunta 1
Pregunta
A longitudinal wave travels through a long spring. The spring is shown at one instant.
What is the wavelength of the wave?
Image:
Q1 (binary/octet-stream)
Respuesta
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A
-
B
-
C
-
D
Pregunta 2
Pregunta
A sound wave has a frequency of 2500 Hz and a speed of 1500 m.s^–1.
What is the shortest distance from a point of maximum pressure in the wave to a point of minimum pressure?
Respuesta
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A 0.15 m
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B 0.30 m
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C 0.60 m
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D 1.20 m
Pregunta 3
Pregunta
A sound wave is displayed on the screen of a cathode-ray oscilloscope (c.r.o.) as shown.
The time-base of the c.r.o. is set at 2.5 ms.cm^–1.
What is the frequency of the sound wave?
Image:
Q3 (binary/octet-stream)
Respuesta
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A 50 Hz
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B 100 Hz
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C 200 Hz
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D 400 z
Pregunta 4
Pregunta
The period of an electromagnetic wave is 1.0 ns.
What are the frequency and wavelength of the wave?
Image:
Q4 (binary/octet-stream)
Respuesta
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A
-
B
-
C
-
D
Pregunta 5
Pregunta
Which statement about progressive longitudinal waves is not correct?
Respuesta
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A The oscillations of the particles are parallel to the direction of travel of the wave energy.
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B They have a series of nodes and antinodes.
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C They need a medium through which to travel.
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D They transfer energy.
Pregunta 6
Pregunta
A bicycle gear wheel is a disc with 50 ‘teeth’ equally spaced around its edge, as shown. The gear wheel is rotated 10 times each second. A springy strip of metal is vibrated by the rotating ‘teeth’.
The metal strip produces a sound of frequency that is equal to the frequency of vibration of the strip.
The speed of sound in air is 330 m.s^–1.
What is the wavelength of the emitted sound?
Image:
Q6 (binary/octet-stream)
Respuesta
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0.66 m
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1.5 m
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6.6 m
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500 m
Pregunta 7
Pregunta
Which row describes the oscillations of two moving particles in a stationary wave that are separated by a distance of half a wavelength?
Image:
Q7 (binary/octet-stream)
Respuesta
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A
-
B
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C
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D
Pregunta 8
Pregunta
Two wave sources are oscillating in phase. Each source produces a wave of wavelength λ. The
two waves from the sources meet at point X with a phase difference of 90°.
What is a possible difference in the distances from the two wave sources to point X?
Respuesta
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A λ/8
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B λ/4
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C λ/2
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D λ
Pregunta 9
Pregunta
Which statement about electromagnetic waves in a vacuum is correct?
Respuesta
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A Amplitude is inversely proportional to velocity.
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B Frequency is inversely proportional to wavelength.
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C Intensity is proportional to amplitude.
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D Velocity is proportional to wavelength.
Pregunta 10
Pregunta
A transverse wave travels along a rope.
The graph shows the variation of the displacement of the particles in the rope with distance along it at a particular instant.
At which distance along the rope do the particles have maximum upwards velocity?
Image:
Q10 (binary/octet-stream)
Respuesta
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A 0.5 m
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B 1.0 m
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C 1.5 m
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D 2.0 m
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