G
m m
≅
×
7 Superposition Principle: The principle is based on the property that the
forces with which two charges attract or repel each other are not
affected by the presence of a third (or more) additional charge(s) For
an assembly of charges q1, q2, q3, , the force on any charge, say q1, is
the vector sum of the force on  q1 due to q2, the force on q1 due to q3,
and so on