a) 2 identical charges are placed at 'r' distance. A charge 'q' is placed in between such that the 3 charges are at equilibrium. Find the position of 'q'. b) If 3 charges q1, q2, q3 are placed on the vertices of an equilateral triangle, find the net force acting on the centroid of the triangle.

Asked by padmakrith | 11th Mar, 2013, 09:22: PM

Expert Answer:

1) when the three charges are in equilibrium,
net forces=0
 
kQ2/r2  +kQq/(r-x)2   =kQq/x2
 
solving this equation one can find the position of the charge q.

Answered by  | 12th Mar, 2013, 11:28: AM

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