What are forced vibrations? Give two examples.

1.	What are forced vibrations? Give two examples.
Answer» When an oscillatory system is made to oscillate under the action of an externally applied periodic force, it is said to execute a ‘forced vibration’. Examples: (i) The vibrations produced in the board of a guitar when its string is made to vibrate. (ii) The vibrations produced in the table top when the stem of a vibrating tuning fork is pressed against it.

Answer»

When an oscillatory system is made to oscillate under the action of an externally applied periodic force, it is said to execute a ‘forced vibration’.

Examples:

(i) The vibrations produced in the board of a guitar when its string is made to vibrate.

(ii) The vibrations produced in the table top when the stem of a vibrating tuning fork is pressed against it.

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