Three charges 
each equal to q are placed at the vertices of an equilateral triangle of side 
What will be the force on a charge Q placed at the centroid of triangle?
Text Solution
Verified by ExpertsD
let the triangle be ABC as follow:-
Distance AO of centroid from A is 
Similarly BO and CO are equal to 
Force on Q at O due to charge 
placed at A
along AO
Similarly 
along OB
along CO
Angle between F 2 and F 3 is 
According to parallelogram law of vector addition:-
Let, 
Force due to charge q at A is equal and opposite to the resultant force 
. So the force experienced is Zero.
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