Q1. A wave has a frequency of 500 Hz and a wavelength of 0.5 m. What is the speed of the wave? (2023)
Solution:
The speed of the wave can be calculated using the formula v = fλ. Here, v = 500 Hz * 0.5 m = 250 m/s.
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Q2. 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)
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.
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Q3. What type of wave is produced when a vibrating tuning fork is placed on a table? (2022)
Solution:
A vibrating tuning fork produces longitudinal waves in the air, which then can create transverse waves in the surface of the table.
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Q4. Which of the following waves requires a medium for propagation? (2022)
Solution:
Sound waves require a medium (solid, liquid, or gas) for propagation, while electromagnetic waves do not.
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Q5. Which of the following statements is true about sound waves? (2023)
Solution:
Sound waves require a medium (solid, liquid, or gas) to travel and cannot propagate through a vacuum.
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Q6. Which of the following phenomena is NOT associated with waves? (2023)
Solution:
Conduction is a mode of heat transfer and is not associated with wave phenomena.
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Q7. If the amplitude of a wave is tripled, what happens to the energy carried by the wave? (2019)
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.
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Q8. If the amplitude of a wave is increased, what happens to its energy? (2019)
Solution:
The energy of a wave is proportional to the square of its amplitude. Therefore, if the amplitude increases, the energy also increases.
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Q9. What type of wave is characterized by particle motion being parallel to wave motion? (2023)
Solution:
In a longitudinal wave, the particle motion is parallel to the direction of wave propagation.
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Q10. A wave has a frequency of 500 Hz and a wavelength of 0.68 m. What is the speed of the wave? (2021)
Solution:
The speed of the wave can be calculated using the formula v = fλ. Thus, v = 500 Hz * 0.68 m = 340 m/s.
