When a positive $q$ charge is taken from lower potential to a higher potential point, then its potential energy will
When a positive $q$ charge is taken from lower potential to a higher potential point, then its potential energy will
- A
Decrease
- B
Increases
- C
Remain unchanged
- D
Become zero
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A solid sphere of radius $R$ carries a charge $(Q+q)$ distributed uniformly over its volume. A very small point like piece of it of mass $m$ gets detached from the bottom of the sphere and falls down vertically under gravity. This piece carries charge $q.$ If it acquires a speed $v$ when it has fallen through a vertical height $y$ (see figure), then :
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- [JEE MAIN 2020]
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