Q. A sound wave travels through air at a speed of 340 m/s. What is the wavelength of a sound wave with a frequency of 1700 Hz? (2022)
A.
0.2 m
B.
0.5 m
C.
1.0 m
D.
2.0 m
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Solution
Using the formula λ = v/f, where v is the speed and f is the frequency, we have λ = 340 m/s / 1700 Hz = 0.2 m.
Correct Answer: A — 0.2 m
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Q. A wave has a frequency of 50 Hz and a wavelength of 2 m. What is the speed of the wave? (2021)
A.
25 m/s
B.
50 m/s
C.
100 m/s
D.
200 m/s
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Solution
The speed of a wave is given by the formula v = fλ. Here, v = 50 Hz * 2 m = 100 m/s.
Correct Answer: B — 50 m/s
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Q. A wave has a frequency of 500 Hz and a wavelength of 0.5 m. What is the speed of the wave? (2023)
A.
250 m/s
B.
500 m/s
C.
1000 m/s
D.
2000 m/s
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Solution
The speed of the wave can be calculated using the formula v = fλ. Here, v = 500 Hz * 0.5 m = 250 m/s.
Correct Answer: B — 500 m/s
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Q. A wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is the speed of the wave? (2021)
A.
340 m/s
B.
500 m/s
C.
680 m/s
D.
250 m/s
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Solution
The speed of the wave can be calculated using the formula v = fλ. Thus, v = 500 Hz * 0.68 m = 340 m/s.
Correct Answer: A — 340 m/s
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Q. If a wave has a frequency of 50 Hz and a wavelength of 4 m, what is its speed? (2019)
A.
100 m/s
B.
200 m/s
C.
50 m/s
D.
25 m/s
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Solution
The speed of a wave can be calculated using the formula v = f × λ. Here, v = 50 Hz × 4 m = 200 m/s.
Correct Answer: A — 100 m/s
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Q. If a wave has a speed of 300 m/s and a frequency of 150 Hz, what is its wavelength? (2023)
A.
1 m
B.
2 m
C.
3 m
D.
4 m
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Solution
Using the wave equation v = fλ, we can rearrange it to find λ = v/f. Thus, λ = 300 m/s / 150 Hz = 2 m.
Correct Answer: B — 2 m
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Q. If the amplitude of a wave is increased, what effect does it have on the energy of the wave? (2022)
A.
Energy decreases
B.
Energy remains the same
C.
Energy increases
D.
Energy becomes zero
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Solution
The energy of a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy also increases.
Correct Answer: C — Energy increases
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Q. If the amplitude of a wave is increased, what effect does it have on the energy carried by the wave? (2019)
A.
Energy decreases
B.
Energy remains the same
C.
Energy increases
D.
Energy becomes zero
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Solution
The energy carried by a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy also increases.
Correct Answer: C — Energy increases
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Q. If the amplitude of a wave is increased, what happens to its energy? (2019)
A.
Decreases
B.
Increases
C.
Remains the same
D.
Becomes zero
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Solution
The energy of a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy also increases.
Correct Answer: B — Increases
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Q. If the amplitude of a wave is tripled, what happens to the energy carried by the wave? (2019)
A.
It remains the same
B.
It doubles
C.
It triples
D.
It increases by a factor of nine
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Solution
The energy carried by a wave is proportional to the square of the amplitude. Therefore, if the amplitude is tripled, the energy increases by a factor of 3^2 = 9.
Correct Answer: D — It increases by a factor of nine
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Q. In a standing wave, what are the points called where there is no displacement? (2020)
A.
Nodes
B.
Antinodes
C.
Crests
D.
Troughs
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Solution
In a standing wave, the points where there is no displacement are called nodes.
Correct Answer: A — Nodes
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Q. What is the relationship between frequency (f) and period (T) of a wave? (2023)
A.
f = T
B.
f = 1/T
C.
f = T^2
D.
f = 2πT
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Solution
The frequency (f) is the reciprocal of the period (T), given by the formula f = 1/T.
Correct Answer: B — f = 1/T
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Q. What is the relationship between frequency and period of a wave? (2020)
A.
Frequency = Period × Speed
B.
Frequency = 1/Period
C.
Frequency = Speed × Wavelength
D.
Frequency = Wavelength/Speed
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Solution
The frequency (f) of a wave is the reciprocal of the period (T), given by the formula f = 1/T.
Correct Answer: B — Frequency = 1/Period
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Q. What type of wave is characterized by particle motion being parallel to wave motion? (2023)
A.
Transverse wave
B.
Longitudinal wave
C.
Surface wave
D.
Standing wave
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Solution
In a longitudinal wave, the particle motion is parallel to the direction of wave propagation.
Correct Answer: B — Longitudinal wave
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Q. What type of wave is produced when a vibrating tuning fork is placed on a table? (2022)
A.
Transverse wave
B.
Longitudinal wave
C.
Surface wave
D.
Electromagnetic wave
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Solution
A vibrating tuning fork produces longitudinal waves in the air, which then can create transverse waves in the surface of the table.
Correct Answer: B — Longitudinal wave
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Q. Which of the following is an example of a longitudinal wave? (2023)
A.
Light wave
B.
Sound wave
C.
Water wave
D.
Seismic S-wave
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Solution
A sound wave is an example of a longitudinal wave, where the particle displacement is parallel to the direction of wave propagation.
Correct Answer: B — Sound wave
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Q. Which of the following phenomena is NOT associated with waves? (2023)
A.
Interference
B.
Diffraction
C.
Refraction
D.
Conduction
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Solution
Conduction is a mode of heat transfer and is not associated with wave phenomena.
Correct Answer: D — Conduction
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Q. Which of the following statements is true about sound waves? (2023)
A.
They can travel through a vacuum
B.
They are transverse waves
C.
They require a medium to travel
D.
They travel faster in air than in water
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Solution
Sound waves require a medium (solid, liquid, or gas) to travel and cannot propagate through a vacuum.
Correct Answer: C — They require a medium to travel
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Q. Which of the following waves requires a medium for propagation? (2022)
A.
Electromagnetic waves
B.
Sound waves
C.
Light waves
D.
Radio waves
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Solution
Sound waves require a medium (solid, liquid, or gas) for propagation, while electromagnetic waves do not.
Correct Answer: B — Sound waves
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Q. Which of the following waves requires a medium to travel? (2023)
A.
Electromagnetic waves
B.
Sound waves
C.
Radio waves
D.
Light waves
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Solution
Sound waves require a medium (solid, liquid, or gas) to travel, while electromagnetic waves can travel through a vacuum.
Correct Answer: B — Sound waves
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