Which of the following statements is correct? - Vidyadip

MCQ

Which of the following statements is correct?

✓
In case of a wave, traveling in a string, oscillation energy of an elemental length remains constant.
B
In case of a wave, traveling in a string, oscillation energy of an elemental length varies periodically.
C
In case of a wave, traveling in a string, kinetic energy of all elemental parts having equal length is same.
D
none of these

✓

Answer

Correct option: A.

In case of a wave, traveling in a string, oscillation energy of an elemental length remains constant.

a
When wave travels in a medium then the displacement and velocity at a point varies with time. Hence, for an elemental length, its $K. E.$ and $P . E . ,$ both vary with time. But the total energy remains constant.

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