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  • Help me answer: If a person brings an electron towards another electron then the change in potential energy of the entire system will be

If a person brings an electron towards another electron then the change in potential energy of the entire system will be

  • Option 1)

    Increases

  • Option 2)

    Half

  • Option 3)

    Decreases

  • Option 4)

    Reduces to zero

 

Answers (2)

As we learnt in

Potential Energy Of System Of two Charge -

U=\frac{kQ_{1}Q_{2}}{r}  \left ( S.I \right )

U= \frac{Q_{1}Q_{2}}{r}  \left ( C.G.S \right ) 

 

- wherein

K=\frac{1}{4\pi \epsilon _{0}}

 

 U = \frac{Kq_{1}q_{2}}{r} = \frac{K-\left ( -e \right )\left ( -e \right )}{r} = \frac{Ke^{2}}{r}

If bring two electrons together then r decreases, U increases.


Option 1)

Increases

This option is correct

Option 2)

Half

This option is incorrect

Option 3)

Decreases

This option is incorrect

Option 4)

Reduces to zero

This option is incorrect

Posted by

Vakul

View full answer

Increase

Posted by

Faheem

View full answer

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