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Find minimum distance between dipoles

2 votes

My try :

But answer does not match.

asked Jan 30 in Physics Problems by koolman (4,286 points)
edited Feb 20 by koolman
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1 Answer

1 vote
Best answer

Your error is near the start of the calculation. The distance between diagonally opposite charged masses is $\sqrt{\ell^2+d^2}$ not $\sqrt{\ell^2+(\frac{d}{2})^2}$.

Therefore in your answer $d$ should be replaced by $2d$, giving $n=6$.

answered Feb 20 by sammy gerbil (28,806 points)
selected Feb 23 by koolman