question_answer

Electric field at the centroid of triangle carrying q charge at each corner will be:

A)  \[\sqrt{2kq}\]            

B)  \[\frac{1}{2}.\frac{\sqrt{kq}}{{{r}^{2}}}\]

C)  \[\frac{4kq}{{{r}^{2}}}\]              

D)  zero

Correct Answer: D

Solution :

The resultant of three forces on unit charge a the centroid of triangle would be zero. Hence, electric field will also zero.