MCQ
In which case does the potential energy decrease?
- AOn compressing the spring.
- BOn stretching a spring.
- COn moving a body against gravitational pull.
- ✓On the raising of an air bubble in water.
✓
Answer
Correct option: D.
On the raising of an air bubble in water.
$P.E.$ decreases when an air bubble rises in water. Because work is done by upthrust.
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