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Consider 3 charges q1 q2 q3 each equal to q at the vertices of an equilateral triangle of side L. what is the force on a charge Q placed at the centroid of the triangle, as shown in fig?
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Consider 3 charges q1 q2 q3 each equal to q at the vertices of an equi...
Force on a charge Q at the centroid of an equilateral triangle

Introduction:
When three charges q1, q2, and q3 are placed at the vertices of an equilateral triangle, a charge Q placed at the centroid of the triangle experiences a net force due to the interactions between the charges. In this scenario, we will calculate the force on charge Q and explain the process in detail.

Explanation:
1. Charge configuration:
- Three charges q1, q2, and q3 are placed at the vertices of an equilateral triangle of side L.
- The charge Q is placed at the centroid of the triangle.

2. Centroid of an equilateral triangle:
- The centroid of an equilateral triangle is the point where all three medians intersect.
- The medians are the line segments drawn from each vertex to the midpoint of the opposite side.
- The centroid divides each median into two segments in the ratio 2:1, with the longer segment being toward the vertex.

3. Electric force between charges:
- The electric force between two charges is given by Coulomb's law: F = k * (q1 * q2) / r^2, where k is the electrostatic constant, q1 and q2 are the charges, and r is the distance between them.
- The force can be attractive (if the charges have opposite signs) or repulsive (if the charges have the same sign).

4. Force on charge Q:
- To calculate the force on charge Q, we need to consider the forces due to each of the charges q1, q2, and q3.
- Since the charges are equidistant from Q, the magnitudes of the forces due to q1, q2, and q3 will be the same.
- The directions of the forces will depend on the signs of the charges.

5. Net force on charge Q:
- Since the forces due to q1, q2, and q3 are acting along the medians of the equilateral triangle, the net force on charge Q will be zero.
- This is because the forces will cancel out each other due to the symmetry of the equilateral triangle.

Conclusion:
In conclusion, when three charges q1, q2, and q3 are placed at the vertices of an equilateral triangle, a charge Q placed at the centroid of the triangle experiences a net force of zero. This is due to the symmetry of the equilateral triangle, resulting in the forces canceling out each other along the medians.
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Consider 3 charges q1 q2 q3 each equal to q at the vertices of an equilateral triangle of side L. what is the force on a charge Q placed at the centroid of the triangle, as shown in fig?
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