Physics
A body is vibrating under the influence of an external periodic force of frequency exactly equal to the natural frequency of the vibrations of the body. It executes :
- damped vibrations
- forced vibrations
- resonant vibrations
- natural vibrations
Related Questions
If l is the length of the string stretched between its ends, the wavelength of different modes in Figure (1), (2) and (3) will be :
- 2l/2, 2l, 2l/3
- 2l/3, 2l/2, 2l
- 2l, 2l/2, 2l/3
- 2l, 21/3, 2l/2
A slim branch of a tree is pulled and released. It makes …………… vibrations.
- damped
- natural
- forced
- resonant
At resonance, a loud sound is heard because the body vibrating with a large …………… sends forth a large amount of energy in the medium.
- amplitude
- frequency
- wavelength
- time period
The sound box of a musical instrument is so constructed that the air column inside it has a natural frequency …………… that of the string stretched in it.
- greater than
- smaller than
- equal to
- cannot say