Answer:
Work done by the electric force as one of the charges moves to an empty corner is 25.71 KJ
Explanation:
Work done on a unit positive charge = Electric field potential X distance moved by the charge.
Electric field potential = (Kq)/r²
Where;
k is coulomb's constant = 8.99 X 10⁹ Nm²/C²
q is magnitude of point charge = 4.0 x 10⁻⁶ C
r is the distance between the point charges = 0.715 m
Then, Work done on a unit positive charge = (Kq)/r² X r
Work done on a unit positive charge = (kq)/r
Work done on a unit positive charge = (8.99 X 10⁹ X 4.0 x 10⁻⁶)/0.715
Work done on a unit positive charge = 25.71 X 10³ J = 25.71 KJ
Therefore, work done by the electric force as one of the charges moves to an empty corner is 25.71 KJ
