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Q.)Three point charges, which initially are infinitely far apart are placed at the corners of an equilateraltriangle with sides d. Two of the point charges are identical and have charge q. If zero net work is required to place the three charges at the corners of the triangle, what must be the value of the third charge be?Ans. -q/2

Abhisek Roy , 12 Years ago
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anser 3 Answers
Chetan Mandayam Nayakar

Last Activity: 12 Years ago

let k=4*pi*ε0

let third charge be Q

(1/k)((q2/d)+ (2Qq/d))=0

DHRUBA JYOTI ROY KARMAKAR

Last Activity: 12 Years ago

let,the charge on third charge be Q...

so,calculate the energy of the third charge and equate it to zero

it will give you the charge of d third charge to be -q/2

Abhisek Roy

Last Activity: 12 Years ago

thanks wellwisher

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