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प्रश्न
What is a bulb horn ? Name the principle on which a bulb horn works.
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उत्तर
A bullhorn is a cone-shaped wind instrument that is used for signaling in bicycles, cars, buses, trucks, boats, etc. A bullhorn works on the principle of multiple reflections of sound.
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संबंधित प्रश्न
Name the characteristic of sound in relation to its waveform.
Define amplitude term in relation to a wave.
State the use of echo by a bat, dolphin and fisherman.
Explain how the principle of echo is used by
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How are bats able to fly in the dark?
A type of electromagnetic wave has a wavelength of 50 Å. Name the wave and state one use of this type of wave.
Draw a diagram representing a wave of amplitude 4 cm and wavelength 2 m. If the frequency of the wave is 150 Hz, calculate its velocity.
Waves produced on the surface of the water are formed to move with a velocity of 24 ms−1. If the wavelength of these waves equals 20 cm. find the
(i) frequency (no. of waves produced per second)
(ii) the time period (i.e. the time required to produce one wave) for these waves.
