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Two free positive charges 4q and …

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Two free positive charges 4q and q are a distance l apart. What charge Q is needed to achieve equilibrium for the entire system and where should it be placed form charge q? (BY SHORTCUT METHOD.)

Posted by Ayush Vishwakarma?? 5 years, 3 months ago

CBSE > Class 12 > Physics

4 answers

Aakash Kumar 5 years, 3 months ago

Shorten it by yourself

Ayush Vishwakarma?? 5 years, 3 months ago

It's to long.

Aakash Kumar 5 years, 3 months ago

Put a charge Q = - 4q/9 at a distance l/3 to the left of charge Q. Am I right???

Aakash Kumar 5 years, 3 months ago

When two charges nq and q are kept apart by a distance d, for equilibrium of all charges, we put a charge Q= - nq/(root under n+1)² at a distance =d/root under n+1 left to charge q nq Q q <——————————<———————> d-x x Here n=4, Pulling in formula Q= -4q/(2+1)²= - 4q/9 x= l/2+1=l/3

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