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Find the work done in bringing a charge +q from infinity to a distance a from a charge +Q (using integration)?
I tried it but the sign of my work was +ve which is incorrect (it should be -ve), can someone find what i did wrong ?

Chinmay , 5 Years ago
Grade 10
anser 2 Answers
Vikas TU

Last Activity: 5 Years ago

Dear student 
You have done mistakes in taking the imit of integration. 
It will be from a to infinity, 
which will give you extra negative sign in your result.
If you are taking it from infinity to a then add extra negative sign.
Good Luck 
Chinmay

Last Activity: 5 Years ago

Why would the limit be from a to infinity.
We are bringing +q from infinity to a. 
So r vector initial is infinity and r vector final is a. 
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