1.

A moving electron approaches another electron. What would be the change in the potential energy of this system ?

Answer»

Remains constant
Increases
Decreases
May increase or decrease

SOLUTION :Potential energy for a system of two electron
`U=(k(-e)(-e))/(R) `
`= (ke^(2))/(r)`
where `ke^(2)` is constant
`:. U PROP (1)/(r)`
`:.` As r decreses U increases.


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