Question

What does q1 + q2 = 0 signify in electrostatics?

Answer 1

Answer:

The term q1 and q2 are the variables used for charge in electrostatics which can be either positive or negative.

The given expression is

q1+q2=0

q1= -q2

Meaning,

By the above expression we cam conclude that

both the charges have same numeral value. The only difference is the sign.

Note,

A special note to be taken that the (-) in -q2 charge is taken not only for the direction but also for the magnitude of the charge.

Example.

If a charge q1 is taken of a magnitude 4C (say) then the magnitude of the charge q2 becomes -4C.