(a) The total electrostatic energy of the system is determined as 38.34/r.
(b) The magnitude of the work done in taking charge 3 to infinity is determined with kq₃/r.
What is electrostatic energy?
Electrostatic energy of point charges is the potential energy of the point charges.
V = kq/r
V = k/r(q₁ + q₂ + q₃)
V = K/r(5.86 + 6.22 - 7.82) x 10⁻⁹
V = k/r(4.26)x 10⁻⁹
V = (9 x 10⁹/r) x ((4.26)x 10⁻⁹)
V = 38.34/r
where;
- r is the common distance between the charges.
Work done in moving a charge to infinity
The electric potential at a point is the amount of work done in bringing a unit positive charge from infinity to that point.
The magnitude is determined with the formula below.
V = kq₃/r
Learn more about electric potential energy here: https://brainly.com/question/14306881
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