


ICSE /Class 10
Physics MCQ Based On Types of vibrations and resonance
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ICSE Class 10 Physics Types of vibrations and resonance
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The fact that you can hear sounds around corners and around barriers involves both diffraction and reflection of sound. Diffraction in such cases helps the sound to "bend around" the obstacles.
Temperature is also a condition that affects the speed of sound. Heat, like sound, is a form of kinetic energy. Molecules at higher temperatures have more energy, thus they can vibrate faster. Since the molecules vibrate faster, sound waves can travel more quickly.
The periodic vibration of a body of decreasing amplitude in presence of external resistive force are called damped vibrations.
Ultrasound is sound waves with frequencies higher than the upper audible limit of human hearing. Ultrasound is not different from "normal" sound in its physical properties, except that humans cannot hear it.
f∝√T
When sound wave goes from one medium to another medium this phenomenon is called law of refraction of sound
The periodic vibration of a body in absence of external force is called natural vibration of a body
When sound wave goes from one medium to another medium its speed wil change.
f∝1/l
When the frequency of the externally applied periodic force on a body is equal to its natural frequency, the body readily begins to vibrate with an increased amplitude.

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