MCQ
The equivalent of S.I. unit of power or capacity (watt) is:
- A$kg ms ^{-2}$
- B$kg m ^2 s^2$
- ✓$kg m ^2 s^3$
- D$kg m ^2$
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$I.$ Waves created on the surfaces of a water pond by a vibrating sources.
$II.$ Wave created by an oscillating electric field in air.
$III.$ Sound waves travelling under water.
Which of these can be polarized