Question

Two point charges of 3 microcoulomb 15 microcoulomb are kept 30 cm apart in air find the force experienced by one charge due to other what will be our answer if charges are removed the medium of eris equal to 5 cm distance apart

Answer 1

Hope this helps you ☺️☺️✌️✌️

Answer 2

If ab + bc = ac then the three points are collinear. The line segments can be translated to vectors ab, bc and ac where the magnitude of the vectors are equal to the length of the respective line segments mentioned. By example of the points you've given in response to Naveen.