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given insulator ball with radius R that charged with uniformed density p<0.

the ball is charged with -3Q

3 colon charges with Q>0 each one, are found inside the ball (look at the draw)

the charges found at triangle that it's sides are equal (each side length = d)

and d<=2R

the triangle found at a plane that divide the ball to two equal areas.

given that all the system is balanced, found the length d between the charges

draw at http://s7.yousendit.com/d.aspx?id=269C621FA10036C8DC0AB7CAB624D86E

thanks!

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# Homework Help: Electrical field

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