Given an equilateral triangle with side l. Find E at the centroid. The linear charge density is as shown in figure.

In the given arrangement of a charged square frame find field at centre. The linear charged density is as shown in figure

If linear charge density of a wire as shown in the figure is lambda

An equilateral triangle has a side length L. A charge +q is kept at the centroid of the triangle . P is a point on the perimeter of the triangle. The ratio of the minimum and maximum possible electric potentials for the point P is

Three point masses m,m and 2m are placed on the vertex of an equilateral triangle of side 'a' Another point mass 'm' is placed at the centroid of the triangle as shown in the figure. If the magnitude of net force on the point mass placed at centroid is (KGm^2)/(a^2) then find the value of K (G= universal gravitational constant )